Crooked Wing

Crooked wing is a developmental deformity in which one or both wings twist outward at the carpal joint, causing the flight feathers to project away from the body at an unnatural angle rather than lying flat against the bird's sides. The condition is most widely recognized in waterfowl such as geese, ducks, and swans, but it can occur in a range of avian species raised in captivity, including parrots, raptors kept in rehabilitation settings, and various ornamental birds. The outward rotation of the distal wing gives affected birds a distinctive appearance, with the primary flight feathers pointing laterally or even upward instead of folding neatly along the flank. In severe cases, the wing may droop noticeably and trail along the ground, exposing the bird to secondary injuries and infections.

The condition is known by several common names that describe its visual presentation. Angel wing refers to the upward and outward splay of the wing tip that can resemble outstretched angel wings when both sides are affected. Slipped wing describes the displacement of the carpal joint from its normal anatomical alignment. Airplane wing captures the horizontal projection of the feathers away from the body. Regardless of the terminology used, the underlying pathology involves abnormal growth and rotation at the wrist joint during the critical period of wing development, resulting in a permanent structural deformity if not corrected early.

Crooked wing is overwhelmingly a condition of young, rapidly growing birds. The period of greatest vulnerability corresponds to the phase when flight feathers are developing and the bones of the wing are still soft and pliable. During this window, the weight of blood-filled, growing feathers can exert rotational force on the immature carpal joint, particularly when skeletal growth is accelerated by excessive dietary protein or caloric intake. Once the bones harden and the joint ossifies in the rotated position, the deformity becomes permanent. This narrow developmental window is both the challenge and the opportunity: early detection allows for simple corrective measures, while delayed recognition leads to an irreversible outcome.

Although crooked wing is not life-threatening in managed captive settings where flight is unnecessary for survival, it carries significant welfare implications. Affected birds cannot fly, which eliminates their ability to escape predators, migrate, or engage in normal flight-related behaviors. In wild or semi-wild populations, flightlessness is essentially a death sentence during migration season or when predators are present. Even in captive environments, the inability to fly restricts exercise, social interaction, and behavioral enrichment. The trailing wing is also vulnerable to abrasion, soiling, and trauma, which can lead to chronic skin breakdown and secondary infections that compound the bird's discomfort.

Dietary factors are the most thoroughly documented contributors to crooked wing, with excessive protein and carbohydrate intake during the rapid growth phase being the primary nutritional culprits. In waterfowl, the condition is strongly associated with birds that are fed bread, crackers, popcorn, and other human food by well-meaning park visitors. These high-energy, nutritionally unbalanced foods accelerate growth rates beyond what the developing skeletal system can support, causing the wing bones to grow faster than the surrounding tendons, ligaments, and muscles can accommodate. The resulting imbalance between the weight of the rapidly developing flight feathers and the structural integrity of the immature carpal joint creates the mechanical conditions for outward rotation.

Protein levels in captive diets deserve particular scrutiny. Commercial starter feeds formulated for domestic poultry often contain protein levels of 20 to 28 percent, which significantly exceed the nutritional requirements of many waterfowl and other species during certain growth phases. Research in managed waterfowl populations has demonstrated a clear dose-response relationship between dietary protein concentration and the incidence of angel wing. Reducing protein levels during the critical growth window dramatically decreases the occurrence of the deformity. Conversely, ad libitum access to high-protein feeds without appropriate management has been shown to increase both the frequency and severity of crooked wing in susceptible populations.

Genetic predisposition plays a contributory role, though its relative importance compared to nutritional factors remains debated. Certain breeds and species appear more susceptible to crooked wing than others under identical dietary conditions. Larger-bodied waterfowl species such as Canada geese, domestic geese, and mute swans show higher incidence rates than smaller species. Within domestic breeds, heavier meat-type strains developed for rapid growth seem more vulnerable than lighter ornamental or wild-type birds. This pattern suggests that genetic selection for rapid growth inadvertently increases susceptibility by amplifying the mismatch between feather weight and skeletal maturation rate. However, the condition rarely develops in genetically predisposed birds that receive appropriate nutrition, indicating that genetics alone is insufficient to cause the deformity.

Environmental and management factors also influence the development of crooked wing. Overcrowding reduces opportunities for exercise, which is important for normal musculoskeletal development. Birds raised on smooth, flat surfaces without access to water for swimming develop differently than those with natural environmental complexity. Lack of appropriate exercise during the growth phase may weaken the muscles and connective tissues that stabilize the carpal joint, increasing vulnerability to rotational deformity. Additionally, birds raised without parental guidance may adopt abnormal resting postures that contribute to joint laxity. Inadequate exposure to natural sunlight or improper supplementation can result in vitamin D deficiency, which impairs calcium metabolism and bone mineralization, further weakening the developing skeletal structures.

The mechanical dynamics of feather growth are central to understanding why the carpal joint is specifically vulnerable. As blood feathers develop, they are heavy with vascular tissue and fluid, creating substantial weight at the wing tip. In a normally growing bird, the carpal bones and supporting structures mature at a rate that keeps pace with feather development, maintaining adequate structural support. When growth is artificially accelerated through overnutrition, the feathers may develop faster than the supporting skeleton, creating a lever effect at the wrist joint. Gravity pulls the heavy feather mass downward and outward, and the soft, incompletely ossified carpal bones deform under this sustained mechanical load. This process typically begins unilaterally before potentially affecting the second wing.

The earliest signs of crooked wing appear during the feather development phase, typically between two and six weeks of age in waterfowl, though the exact timing varies by species and growth rate. Initial symptoms include a subtle outward flaring of the developing flight feathers on one or both wings. At this stage, the carpal joint may feel slightly loose or unstable when gently palpated, and the wing tip may not fold as tightly against the body as expected. The feather sheaths of the primary and secondary flight feathers may appear to angle away from the body rather than lying parallel to it. These early signs are easy to overlook, especially in birds with dense down that obscures the wing structure, making regular hands-on examination of growing birds essential for early detection.

As the condition progresses, the outward rotation becomes increasingly obvious. The flight feathers begin to project laterally, creating a visible gap between the feather tips and the body. The affected wing or wings may droop below the level of the tail, and the primary feathers may point outward at angles ranging from slightly off-axis to nearly perpendicular to the body. In unilateral cases, the asymmetry between the normal and affected wing is striking. Bilateral cases create the characteristic angel wing silhouette with both wing tips projecting outward and upward. The carpal joint itself may appear swollen or prominent as the developing bones deform under the abnormal mechanical loading.

Physical examination by an experienced avian veterinarian or wildlife rehabilitator reveals specific findings that confirm the diagnosis. Palpation of the carpal joint demonstrates laxity and abnormal range of motion in early cases, progressing to fixed deformity as the bones ossify. The metacarpal bones distal to the wrist may be palpably rotated or angulated. In advanced cases, the joint capsule and surrounding ligaments are stretched and weakened, allowing excessive lateral movement even when the feathers are manually repositioned against the body. Comparison with the unaffected wing in unilateral cases provides a useful reference for normal joint anatomy and range of motion.

Secondary complications provide additional diagnostic clues in birds with established crooked wing. The trailing flight feathers accumulate dirt, fecal material, and moisture, leading to feather damage and skin irritation beneath the exposed wing. Chronic abrasion of the primary feathers against the ground causes progressive breakage and wear. The skin over the exposed carpal joint may develop calluses or pressure sores from abnormal contact with surfaces. In waterfowl, the inability to properly fold the wing creates problems during swimming, as the protruding wing disrupts hydrodynamic efficiency and may become waterlogged. These secondary changes often prompt owners or caretakers to seek veterinary evaluation, even when the primary deformity was not recognized earlier.

Differential diagnosis is important to distinguish crooked wing from other conditions that affect wing position and mobility. Wing fractures, joint luxations, and soft tissue injuries can cause acute wing drooping that may superficially resemble crooked wing. Neurological conditions affecting the brachial plexus or peripheral nerves can cause wing paresis or paralysis with abnormal positioning. Infectious arthritis of the carpal joint produces swelling and abnormal joint alignment but is typically accompanied by heat, pain, and systemic signs of infection. Congenital limb deformities unrelated to nutritional factors may present similarly but are usually evident from hatch rather than developing during the growth phase. Thorough physical examination, patient history regarding diet and growth rate, and radiographic imaging help establish the correct diagnosis.

Clinical diagnosis of crooked wing is often straightforward based on the characteristic physical presentation, particularly in known susceptible species during the appropriate developmental age. An experienced avian veterinarian or wildlife rehabilitator can typically identify the condition through visual inspection and physical examination alone. The outward rotation of the flight feathers, palpable carpal joint laxity or deformity, and age-appropriate developmental history form a distinctive clinical picture. However, thorough diagnostic evaluation is important to assess the severity of the deformity, determine whether corrective intervention is still feasible, identify any underlying nutritional deficiencies or concurrent health problems, and rule out other conditions that may require different treatment approaches.

Radiographic imaging provides essential information about the skeletal structures involved and the degree of ossification. Ventrodorsal and lateral radiographs of the affected wing reveal the alignment of the carpal and metacarpal bones, the degree of rotational deformity at the wrist joint, and the maturity of the growth plates. In young birds where the bones are still developing, radiographs may show widened or irregular growth plates, incomplete ossification of the carpal bones, and angular deviation of the metacarpus. In older birds with established deformity, radiographs demonstrate fixed bony malformation with complete ossification in the rotated position. This information is critical for treatment planning, as the degree of ossification directly determines whether physical correction methods have any chance of success.

Nutritional assessment should be part of the diagnostic workup, as dietary factors are implicated in the majority of cases. A detailed dietary history covering the type, quantity, and composition of feeds offered during the growth period helps identify likely nutritional contributors. Blood work including a basic chemistry panel can reveal metabolic derangements associated with nutritional imbalance, such as abnormal calcium-to-phosphorus ratios, low vitamin D levels, or elevated uric acid from excessive protein intake. Protein electrophoresis may provide additional information about nutritional status and concurrent disease processes. These findings guide nutritional correction as part of the treatment plan and inform preventive strategies for other birds in the same flock or facility.

Assessment of the bird's overall health status is important because crooked wing may coexist with other conditions related to the same underlying nutritional or management problems. Birds raised on inappropriate diets are at risk for multiple concurrent nutritional deficiencies affecting bone density, organ function, immune competence, and feather quality. A complete physical examination should evaluate body condition, feather quality throughout the plumage, skin condition, joint health beyond the affected carpus, and general systemic health. Fecal examination for parasites is warranted since parasitic burdens compound nutritional stress. Any concurrent health issues must be addressed alongside the wing deformity to optimize the bird's overall outcome and quality of life.

The veterinarian should also assess the functional impact of the deformity on the individual bird's welfare and intended lifestyle. For a bird destined to remain in captive care where flight is not essential, a moderate deformity may have relatively limited practical consequences beyond cosmetic appearance, though secondary complications still require management. For a bird intended for release into the wild, the inability to fly renders release inappropriate regardless of other health factors. This functional assessment influences treatment decisions, particularly regarding the aggressiveness of corrective attempts and the appropriateness of surgical intervention, and helps set realistic expectations for the bird's prognosis and long-term management needs.

Early intervention during the developmental window offers the best opportunity for correction and can be remarkably effective when initiated promptly. In very young birds where the carpal bones have not yet ossified, the wing can often be physically repositioned into normal alignment and held in place with a simple wrap or bandage. The affected wing is gently folded into the correct anatomical position against the body, and a figure-eight bandage or veterinary wrap is applied to maintain this alignment. The wrap must be snug enough to prevent the wing from rotating outward but not so tight that it restricts circulation or compresses the chest. This technique works by holding the developing bones in proper alignment while they continue to grow and ossify, essentially allowing the skeleton to harden in the correct position rather than the deformed one.

The duration and management of wing wrapping require careful attention. Wraps are typically maintained for several days to two weeks depending on the age of the bird and severity of the deformity, with regular removal and reapplication to monitor progress, check for pressure sores, and allow brief periods of gentle exercise. The wrap must be changed whenever it becomes soiled, wet, or loosened, as a poorly fitting wrap can cause more harm than good. During rewrapping, the caretaker should assess whether the wing maintains improved alignment when temporarily unwrapped. Gradual improvement in resting wing position during unwrapped intervals indicates that the corrective approach is working. Complete correction may require multiple wrapping cycles with progressively longer unwrapped periods as the joint stabilizes.

Dietary modification is an essential concurrent treatment regardless of the bird's age or the stage of deformity. The immediate priority is reducing protein and caloric intake to slow the growth rate and reduce the metabolic drive that contributes to skeletal-feather growth mismatch. For waterfowl, transitioning from high-protein starter feeds to lower-protein maintenance or grower formulations with protein levels around 14 to 16 percent is typically recommended. Eliminating bread, crackers, and other inappropriate human food supplements is critical. Ensuring adequate vitamin and mineral supplementation, particularly calcium, phosphorus in appropriate ratios, and vitamin D, supports proper bone mineralization. Increasing access to natural forage such as grasses and aquatic vegetation provides species-appropriate nutrition that supports balanced growth.

Surgical intervention may be considered for birds with more advanced deformity where physical wrapping alone is insufficient, though surgical correction of crooked wing is technically challenging and outcomes are variable. Procedures may include osteotomy of the metacarpal bones to correct angular deformity, carpal joint stabilization with pins or external fixation, and tightening of stretched joint capsule and ligamentous structures. These procedures require an experienced avian surgeon and carry risks including infection, implant failure, growth plate damage in immature birds, and incomplete correction. Post-surgical management involves extended immobilization, careful physical rehabilitation, and close monitoring for complications. Surgery is generally reserved for birds with significant welfare concerns from the deformity or those intended for educational display where improved appearance and wing function would enhance their role.

For adult birds with fully ossified, fixed deformity, treatment focuses on management rather than correction since the bony changes are permanent and cannot be reversed through wrapping or conservative measures. Management goals include preventing secondary complications from the trailing wing, maintaining good feather and skin condition, providing environmental accommodations that minimize trauma to the affected wing, and ensuring overall health and quality of life. Regular trimming of damaged flight feathers may reduce the weight and drag of the affected wing. Soft substrate, clean environments, and regular inspection of the wing and underlying skin help prevent pressure sores and infections. These birds can live full, comfortable lives in appropriate captive settings with attentive management of their special needs.

Nutritional management during the growth phase is the single most effective prevention strategy for crooked wing. Providing species-appropriate diets formulated specifically for the type of bird being raised, with protein levels matched to the developmental stage, dramatically reduces the incidence of the condition. For waterfowl, this means using waterfowl-specific starter and grower feeds rather than generic poultry feeds designed for broiler chickens or turkeys, which typically contain excessively high protein levels. Protein content should be carefully matched to species requirements, with most waterfowl thriving on feeds containing 18 to 20 percent protein during the starter phase and 14 to 16 percent during the grower phase. Avoiding supplemental high-protein treats and ensuring that total caloric intake does not promote excessively rapid growth are equally important components of nutritional prevention.

Public education plays a vital role in preventing crooked wing in wild and semi-wild waterfowl populations that frequent parks, ponds, and public waterways. The widespread practice of feeding bread and other processed human foods to ducks and geese contributes significantly to the incidence of angel wing in these populations. Educational signage at parks, community outreach programs, and social media awareness campaigns can inform the public about the harmful effects of feeding inappropriate foods to wild birds. When feeding is culturally established and difficult to eliminate entirely, redirecting people toward healthier alternatives such as cracked corn, thawed frozen peas, chopped lettuce, or commercially available waterfowl feed can reduce the nutritional imbalance while preserving the human-wildlife interaction that many communities value.

Environmental enrichment and management practices contribute to musculoskeletal health during development. Providing growing birds with adequate space for exercise encourages normal muscle and connective tissue development that supports joint stability. Access to swimming water is particularly important for waterfowl, as swimming exercises the wing muscles and joints in ways that promote normal development. Natural substrate including grass, soil, and varied terrain encourages diverse movement patterns compared to smooth, flat enclosure floors. Exposure to natural light cycles supports vitamin D synthesis and appropriate hormonal regulation of growth. These environmental factors work synergistically with proper nutrition to promote balanced skeletal development and reduce the risk of carpal deformity.

Breeding and flock management considerations can further reduce crooked wing incidence in captive populations. Selecting breeding stock from lines with no history of the condition may gradually reduce genetic susceptibility, though the strong nutritional component means that genetics alone rarely causes the deformity when diet is appropriate. Avoiding crosses between breeds selected for extreme body size or rapid growth rate can reduce the inherent growth-rate-driven risk. Monitoring growth rates through regular weighing and comparison with species-specific growth curves allows early detection of excessively rapid growth before wing deformity develops. When growth rates exceed expected norms, dietary adjustments can be implemented proactively rather than waiting for clinical signs to appear.

Regular physical examination of growing birds during the critical developmental window enables the earliest possible detection and intervention. Caretakers should examine the wings of developing birds at least twice weekly during the feather growth phase, checking for subtle outward flaring of developing flight feathers, carpal joint laxity, and asymmetry between wings. Training caretakers and aviculturists to recognize the earliest signs of crooked wing increases the likelihood of successful correction through simple wrapping techniques before the deformity becomes fixed. Establishing examination protocols as part of routine husbandry in breeding facilities, wildlife rehabilitation centers, and educational collections ensures consistent monitoring and creates institutional knowledge that benefits bird welfare across successive generations of both birds and their human caretakers.

Waterfowl represent the most commonly affected group, with domestic and wild geese showing particularly high susceptibility. Among geese, the condition occurs most frequently in fast-growing domestic breeds such as Embden and Toulouse, which have been selectively bred for large body size and rapid weight gain. Wild Canada geese in urban park settings where public feeding is common also experience elevated incidence rates compared to populations in undeveloped areas without supplemental feeding. Domestic ducks, particularly heavy breeds like Pekin and Rouen, are similarly vulnerable during their rapid growth phase. Mute swans and other large swan species occasionally develop the condition, and their substantial body size makes the deformity particularly conspicuous and mechanically significant.

Psittacine species kept as companion birds occasionally develop crooked wing, though the condition is less frequently reported than in waterfowl. Hand-raised parrot chicks fed inappropriately formulated hand-feeding formulas or weaned onto nutritionally unbalanced diets may develop carpal deformities during the fledging period. Macaws, cockatoos, and African grey parrots are among the species occasionally affected. The presentation in psittacines may differ somewhat from waterfowl, with the deformity sometimes involving more complex rotational components due to differences in wing anatomy. Treatment principles remain similar, with early detection and corrective wrapping being most effective during the pre-fledging developmental window. Avian veterinarians experienced with companion bird species are best equipped to manage these cases.

Raptors in rehabilitation settings represent another group where crooked wing occasionally occurs, though from somewhat different causes than the nutritional factors predominant in waterfowl. Young raptors raised in rehabilitation after orphaning or injury may develop wing deformities if their growth environment and nutrition do not adequately replicate natural conditions. Inadequate exercise opportunities, inappropriate perching surfaces, and nutritional imbalances in captive raptor diets can contribute to developmental limb abnormalities. The consequences of crooked wing in raptors intended for release are particularly severe, as these species are entirely dependent on precise flight capability for hunting and survival. Rehabilitation facilities managing young raptors maintain strict nutritional protocols and developmental monitoring to minimize the risk of wing deformities that would prevent successful return to the wild.

Gallinaceous birds such as chickens, turkeys, and gamebirds less commonly develop classic crooked wing, though related carpal and limb deformities can occur in rapidly growing meat-type poultry breeds. The intensive genetic selection for rapid growth in commercial broiler chickens has created birds with numerous musculoskeletal vulnerabilities, and wing deformities occasionally appear among the spectrum of skeletal problems in these breeds. In exhibition and heritage poultry breeds where wing carriage is an important show standard, even mild carpal deformities may be identified and selected against in breeding programs. Understanding the species-specific risk factors, growth patterns, and developmental timelines for each avian group allows caretakers to implement targeted prevention and monitoring strategies appropriate to the birds in their care.

Birds living with permanent crooked wing require ongoing management to maintain comfort and prevent complications. The primary long-term concern is protection of the exposed, trailing wing from mechanical damage. Enclosure design should minimize sharp edges, rough surfaces, and obstacles that could catch or abrade the protruding feathers and wing tip. Substrate selection is important, with soft, clean bedding materials preferred over abrasive or wet surfaces that accelerate feather deterioration and skin breakdown. Regular enclosure cleaning prevents accumulation of fecal material and moisture that can soil the trailing wing and promote dermatitis. For waterfowl, maintaining clean water sources and providing easy access ramps to pools reduces the risk of wing contamination during swimming and helps prevent skin infections beneath the affected wing.

Feather maintenance in birds with crooked wing requires more attention than in normally conformed individuals. The flight feathers of the affected wing experience abnormal wear patterns due to their altered position and contact with surfaces, leading to more rapid deterioration than normally folded feathers. Broken or damaged feathers should be assessed regularly and removed if they pose a risk of injury or infection at the follicle. During molt, the growth of new feathers in the deformed wing may be complicated by abnormal feather alignment and potential follicle damage from chronic irritation. Monitoring the molt cycle closely allows early intervention if new feathers develop abnormally or if folliculitis develops in the stressed feather tracts.

Social integration requires thoughtful management for birds with crooked wing, particularly in flock settings. Affected birds may be at a social disadvantage due to their altered appearance and reduced mobility. In waterfowl flocks, dominant individuals may target birds with visible abnormalities, leading to feather pulling, exclusion from preferred resting areas, or aggressive encounters. Providing adequate space, multiple feeding stations, and visual barriers within the enclosure reduces social stress and allows affected birds to avoid confrontations. Monitoring flock dynamics and intervening when bullying occurs protects the welfare of birds that cannot fly away from aggressors. In some cases, housing affected birds with compatible companions in a separate area may be the most humane approach.

Regular veterinary monitoring supports long-term health and early detection of complications. Semi-annual or annual examinations allow the veterinarian to assess the condition of the wing, check for developing pressure sores or skin infections, evaluate joint health, and screen for systemic problems. Radiographic reassessment may be warranted if the wing position appears to change or if pain or swelling develops at the carpal joint. Arthritis may develop in the deformed joint over time due to abnormal mechanical loading, and early detection allows implementation of pain management strategies. Nutritional assessment and dietary adjustments should continue throughout the bird's life to support overall health and optimal feather condition.

Despite the limitations imposed by crooked wing, affected birds can enjoy good quality of life in appropriate captive environments. Many birds with this condition live full lifespans, display normal social behaviors, breed successfully, and engage actively with their environment and human caretakers. Providing environmental enrichment appropriate to the species, including foraging opportunities, social companions, water features for waterfowl, and varied terrain, allows affected birds to express natural behaviors and maintain physical and psychological well-being. The key to successful long-term management is attentive, consistent husbandry that anticipates and prevents the secondary complications to which these birds are predisposed, combined with prompt veterinary attention when problems arise.

Scientific investigation into the mechanisms underlying crooked wing has progressed significantly from early observational reports to more rigorous experimental and epidemiological studies. Controlled feeding trials in waterfowl have established clear relationships between dietary protein levels and the incidence of angel wing, providing the evidence base for current nutritional prevention recommendations. These studies demonstrated that reducing protein content in grower feeds from 22-24 percent to 14-16 percent virtually eliminated new cases in previously affected flocks, confirming the central role of overnutrition in the condition's development. More recent work has explored the specific biochemical pathways through which excessive protein intake disrupts normal bone and cartilage maturation at the carpal growth plate, identifying potential targets for more precise nutritional interventions.

Genetic studies have begun to elucidate the hereditary component of susceptibility. Population-level analyses in managed waterfowl collections have identified family lines with higher and lower incidence of crooked wing under standardized dietary conditions, supporting a polygenic basis for susceptibility. The genes likely involved relate to growth rate regulation, bone mineralization timing, and connective tissue development, areas that overlap with the traits under selection in domestic breeds bred for size and rapid maturation. Genomic approaches may eventually enable identification of specific genetic markers associated with susceptibility, which could inform breeding decisions in managed populations. However, the strong environmental component means that genetic testing alone would be insufficient for prevention without concurrent dietary management.

Wildlife rehabilitation and conservation perspectives have added important dimensions to the understanding and management of crooked wing. Studies of urban waterfowl populations have documented the epidemiological impact of public feeding behaviors on angel wing incidence, providing data that supports public education campaigns and park management policies. Rehabilitation centers have contributed practical knowledge about corrective wrapping techniques, optimal intervention timing, and realistic outcome expectations based on large case series. Conservation programs managing captive breeding populations of endangered waterfowl species apply the accumulated knowledge about crooked wing prevention to protect the flight capability of birds destined for release, where even minor wing deformities can have survival consequences.

Future research directions include investigation of the biomechanical forces acting on the developing carpal joint during feather growth, which may lead to novel preventive approaches beyond dietary management. Advanced imaging techniques including computed tomography and magnetic resonance imaging are being applied to better characterize the progressive skeletal and soft tissue changes during deformity development, providing insights that could improve the timing and technique of corrective interventions. The intersection of nutrition science, developmental biology, and avian orthopedics continues to deepen understanding of this preventable condition, with the ultimate goal of eliminating crooked wing through evidence-based husbandry practices that support balanced growth and normal musculoskeletal development in all captive avian populations.