Phenobarbital

Phenobarbital is the most widely used and well-established anticonvulsant medication in veterinary medicine, including for the management of seizure disorders in rabbits. This barbiturate medication has been used for seizure control for over a century and remains the first-line treatment choice for many veterinarians when managing epilepsy in rabbit patients. Phenobarbital's long history of use means that its effects, dosing, and monitoring requirements are well understood, providing veterinarians and owners with confidence in its application. For rabbits experiencing recurrent seizures, whether from idiopathic epilepsy or secondary to other conditions, phenobarbital offers effective control when properly prescribed and monitored by a rabbit-savvy veterinarian.

The mechanism of action of phenobarbital involves enhancing the effects of the inhibitory neurotransmitter gamma-aminobutyric acid, known as GABA, in the central nervous system. Unlike benzodiazepines that increase the frequency of GABA receptor activation, phenobarbital increases the duration of chloride channel opening when GABA binds to its receptors. This enhanced inhibitory signaling reduces the excitability of neurons throughout the brain, making it more difficult for the abnormal electrical discharges that cause seizures to propagate. Additionally, at higher concentrations, phenobarbital can directly activate GABA receptors and reduce the activity of excitatory neurotransmitters. This robust anticonvulsant mechanism makes phenobarbital effective for controlling various types of seizures. Importantly, phenobarbital does not directly harm the gastrointestinal flora that is so critical to rabbit health, though the sedation it causes may temporarily affect eating patterns.

Phenobarbital is available in multiple formulations suitable for different patient needs. Tablets come in various strengths and can be administered directly or crushed and mixed with palatable vehicles for easier administration to rabbits. Oral liquid formulations allow for precise dose measurement, which is particularly important for small rabbit patients. Compounding pharmacies can prepare customized liquid preparations in concentrations suitable for the small volumes typically given to rabbits. Injectable formulations are available for veterinary hospital use when oral administration is not possible or when rapid loading is needed. The long half-life of phenobarbital in most species allows for twice-daily dosing in many cases, making the medication practical for long-term home administration.

The safety profile of phenobarbital in rabbits requires careful attention to proper dosing and regular monitoring. While phenobarbital is effective and generally well tolerated, it has a narrower therapeutic window than some newer anticonvulsants, meaning that the difference between effective doses and toxic doses is smaller. Regular blood level monitoring helps ensure that medication concentrations remain within the therapeutic range. Phenobarbital is metabolized primarily by the liver, and long-term use can affect liver enzyme levels, necessitating periodic liver function testing. As a controlled substance, phenobarbital requires responsible handling and storage. Working with a rabbit-savvy veterinarian experienced in anticonvulsant management is essential for safe and effective use of this medication in rabbit patients.

The primary indication for phenobarbital in rabbit medicine is the long-term management of epilepsy and recurrent seizure disorders. Phenobarbital serves as a maintenance anticonvulsant, meaning it is given daily to prevent seizures from occurring rather than to stop active seizures in progress. For rabbits diagnosed with idiopathic epilepsy, where no underlying cause for seizures can be identified, phenobarbital is typically the first medication considered because of its proven efficacy, relatively low cost, and extensive track record in veterinary medicine. The goal of phenobarbital therapy is to reduce seizure frequency, duration, and severity to the greatest extent possible while maintaining acceptable quality of life.

Beyond idiopathic epilepsy, phenobarbital may be used for seizure management in rabbits with seizures secondary to known underlying conditions. Structural epilepsy caused by brain abnormalities such as tumors, abscesses, or malformations may respond to phenobarbital therapy even when the underlying cause cannot be fully resolved. Seizures resulting from Encephalitozoon cuniculi infection affecting the brain may be controlled with phenobarbital while treatment for the underlying infection proceeds. Post-traumatic seizures following head injury may require anticonvulsant therapy, with phenobarbital being a common choice. In all these situations, addressing the underlying cause when possible remains important, but seizure control with phenobarbital improves quality of life and prevents additional brain damage from repeated seizure activity.

Phenobarbital is used both as monotherapy and in combination with other anticonvulsant medications. Many rabbits achieve adequate seizure control with phenobarbital alone, making it a practical and cost-effective first-line choice. However, when seizures are not adequately controlled with phenobarbital alone despite achieving appropriate blood levels, additional medications such as levetiracetam or potassium bromide may be added. This combination approach often provides better seizure control than either medication alone. The decision to add medications is based on seizure frequency and severity, phenobarbital blood levels, side effects experienced, and overall quality of life considerations.

Phenobarbital may also be used prophylactically in certain high-risk situations to prevent seizures from developing. Rabbits recovering from brain surgery or significant head trauma may receive phenobarbital during the recovery period when the risk of developing seizures is elevated. This preventive approach aims to avoid the additional brain stress and damage that seizures would cause during a critical healing period. The duration of prophylactic treatment varies depending on the clinical situation and is determined by the treating veterinarian.

The selection of phenobarbital over other anticonvulsant medications depends on several factors specific to each rabbit patient. Phenobarbital is often preferred for its proven efficacy, relatively low cost, and twice-daily dosing convenience. However, it requires regular blood level monitoring and liver function assessment, which adds to the overall cost and complexity of management. Rabbits with pre-existing liver disease may not be ideal candidates for phenobarbital therapy. The sedative effects of phenobarbital, particularly during the initial weeks of treatment, may be a concern for some owners. Your rabbit-savvy veterinarian will help determine whether phenobarbital is the best choice for your rabbit's specific situation.

The dosing protocol for phenobarbital in rabbits must be carefully individualized by a rabbit-savvy veterinarian based on the patient's weight, seizure frequency and severity, and individual response to treatment. Rabbit metabolism differs from that of dogs and cats, and dosing should not be extrapolated directly from protocols used in other species. Accurate weight measurement, preferably in grams, is essential for calculating appropriate doses, as even small dosing errors can result in inadequate seizure control or toxicity. Your veterinarian will determine the starting dose based on your rabbit's specific circumstances and will adjust the dose over time based on seizure response and blood level monitoring.

Typical starting approaches for phenobarbital involve beginning at a conservative dose and titrating upward as needed based on clinical response and blood levels. After starting phenobarbital, it takes approximately two to three weeks for blood levels to reach steady state due to the medication's long half-life. Initial blood level testing is typically performed two to three weeks after starting treatment or after any dose adjustment. If seizures continue despite treatment and blood levels are below the target therapeutic range, the dose is increased and levels rechecked. This process continues until adequate seizure control is achieved, blood levels reach the upper end of the therapeutic range, or side effects become limiting factors.

The duration of phenobarbital treatment is typically lifelong for rabbits with idiopathic epilepsy or chronic seizure disorders. Stopping phenobarbital abruptly can cause severe rebound seizures that may be worse than the original seizure disorder, so the medication should never be discontinued suddenly. If phenobarbital needs to be stopped for any reason, such as severe side effects or transition to a different medication, it must be tapered gradually over weeks under careful veterinary supervision. Even rabbits that have been seizure-free for extended periods typically require continued medication, as seizures will likely recur if treatment is discontinued.

Administering phenobarbital to rabbits requires consistency and proper technique. The medication should be given at approximately the same times each day, typically every twelve hours for twice-daily dosing, to maintain stable blood levels. Tablets can be given directly if your rabbit accepts them, hidden in a small amount of banana or other favored treat, or crushed and mixed with a palatable vehicle. Liquid formulations are administered using a small syringe placed at the side of the mouth, allowing the rabbit to swallow between small amounts. Phenobarbital can be given with or without food, though consistent administration with or without food is recommended to minimize variability in absorption.

If you miss a dose of phenobarbital, give it as soon as you remember unless it is nearly time for the next scheduled dose. In that case, skip the missed dose and resume the regular schedule. Never give a double dose to make up for a missed dose. Occasional missed doses are unlikely to cause immediate problems due to phenobarbital's long half-life, but consistent dosing is important for optimal seizure control. If you frequently miss doses or have difficulty maintaining the dosing schedule, discuss this with your veterinarian, as inconsistent dosing can lead to breakthrough seizures.

Ongoing monitoring is a critical component of phenobarbital therapy. Blood level testing should be performed periodically, typically every six to twelve months once stable, or sooner if seizure control changes or side effects are noted. Liver enzyme testing is recommended at similar intervals to monitor for hepatic effects. Regular veterinary examinations allow assessment of overall health, seizure control, and any medication-related side effects. Keeping a seizure diary recording the date, time, duration, and characteristics of any seizure events helps your veterinarian assess treatment efficacy and make informed dosing decisions.

Phenobarbital generally has a well-characterized side effect profile in veterinary patients, and most rabbits tolerate the medication well when properly dosed and monitored. However, side effects do occur and rabbit owners should be educated about what to expect during treatment. The unique physiology of rabbits means that particular attention should be paid to any effects on appetite or gastrointestinal function, as disruptions in these areas can have serious consequences for rabbit health. Understanding expected side effects helps owners distinguish between normal medication responses and concerning problems requiring veterinary attention.

The most common side effects of phenobarbital in rabbits, particularly during the initial weeks of treatment, relate to the medication's sedative properties. Affected rabbits may appear drowsy, less active than usual, or less interested in their surroundings. This sedation is typically most pronounced when treatment is first started and usually improves over one to three weeks as the rabbit's body adjusts to the medication. Increased appetite and thirst are commonly reported in dogs and cats on phenobarbital and may occur in rabbits as well, though the effect on rabbits has been less extensively documented. Some rabbits may experience mild incoordination or unsteadiness, particularly at higher doses. These effects are generally manageable and often improve with time.

Moderate side effects that may require veterinary evaluation include persistent or pronounced sedation that does not improve after the initial adjustment period. If your rabbit remains significantly drowsy or inactive after two to three weeks on phenobarbital, blood levels should be checked to ensure they are not excessively high. Changes in urination patterns, including increased urine volume, may occur. Any decrease in appetite or food consumption is concerning in rabbits and should be reported to your veterinarian promptly, as reduced eating can trigger gastrointestinal stasis. Changes in fecal pellet production, either decreased quantity or altered consistency, warrant attention. Weight changes in either direction should be monitored and reported.

Serious side effects requiring immediate veterinary attention include signs of phenobarbital toxicity such as severe sedation, inability to stand or walk, lack of responsiveness, or difficulty breathing. These signs may indicate that blood levels have become too high and dose adjustment or treatment is needed. Signs of liver problems, including loss of appetite, vomiting, yellow discoloration of the skin or whites of the eyes, or changes in stool color, require immediate evaluation. Complete gastrointestinal stasis with no eating and no fecal production is always an emergency in rabbits, regardless of the suspected cause. Any sudden dramatic change in your rabbit's condition warrants immediate veterinary care.

Long-term side effects and monitoring considerations are important for rabbits on chronic phenobarbital therapy. Phenobarbital is metabolized by the liver and long-term use can cause elevation in liver enzymes, which may or may not indicate actual liver damage. Regular liver function monitoring helps detect any developing problems early. Phenobarbital induces its own metabolism over time, meaning that higher doses may eventually be needed to maintain the same blood levels and seizure control. Blood dyscrasias including anemia and reduced white blood cell counts have been reported rarely in dogs and cats, and periodic complete blood count monitoring may be recommended. Working closely with your veterinarian for ongoing monitoring helps ensure that phenobarbital therapy remains safe and effective over the long term.

Phenobarbital should not be used in rabbits with known hypersensitivity or allergic reactions to phenobarbital or other barbiturate medications. While true allergic reactions to phenobarbital are uncommon, rabbits that have experienced adverse reactions to this medication in the past should not receive it again. Any history of unusual reactions to sedatives, anesthetics, or other barbiturate drugs should be disclosed to your veterinarian before phenobarbital therapy is considered. Alternative anticonvulsant medications are available for rabbits that cannot tolerate phenobarbital.

Rabbits with significant liver disease represent a relative contraindication to phenobarbital use due to the medication's hepatic metabolism and potential hepatotoxic effects. Since the liver is responsible for processing phenobarbital, impaired liver function can lead to drug accumulation and toxicity. Additionally, long-term phenobarbital use can stress the liver, potentially worsening pre-existing liver conditions. If your rabbit has been diagnosed with liver disease, elevated liver enzymes, or any hepatic condition, discuss this thoroughly with your veterinarian. Alternative anticonvulsants with less hepatic impact, such as levetiracetam, may be more appropriate for rabbits with liver concerns. If phenobarbital must be used in a rabbit with compromised liver function, careful monitoring and dose adjustment are essential.

Certain life stages warrant caution with phenobarbital use in rabbits. The safety of phenobarbital in pregnant rabbits has not been extensively studied, and the medication may affect developing fetuses. Phenobarbital does pass into milk, potentially affecting nursing kits. Breeding does should be managed carefully with discussion of the risks and benefits of anticonvulsant therapy during pregnancy and lactation. Very young rabbits and kits may metabolize phenobarbital differently than adults and may be more sensitive to its effects. Geriatric rabbits may have age-related decline in liver or kidney function affecting drug processing. Your veterinarian will consider these factors when determining if phenobarbital is appropriate for your rabbit.

Other medical conditions that may affect the decision to use phenobarbital include severe respiratory disease, as phenobarbital can cause respiratory depression, particularly at higher doses or toxic levels. Anemia should be evaluated before starting therapy, as phenobarbital may rarely cause blood cell abnormalities. Rabbits with chronic kidney disease may have altered drug elimination. Debilitated rabbits, those with significant other illnesses, or those recovering from surgery may require modified dosing or additional monitoring. Always provide your veterinarian with a complete medical history including all current and past health conditions, all medications and supplements your rabbit receives, and any known drug sensitivities.

Phenobarbital has numerous potential drug interactions due to its effects on liver enzyme systems, making disclosure of all medications, supplements, and products your rabbit receives essential when phenobarbital therapy is being considered or managed. Phenobarbital is a potent inducer of hepatic cytochrome P450 enzymes, meaning it increases the activity of the enzyme systems that metabolize many drugs. This enzyme induction can cause other medications to be cleared from the body more quickly, potentially reducing their effectiveness. Conversely, some medications can affect phenobarbital metabolism, altering its blood levels. Understanding these interactions helps your veterinarian manage your rabbit's medications safely.

Major drug interactions of clinical significance include interactions with other anticonvulsant medications commonly used in combination therapy. When phenobarbital is combined with levetiracetam, the enzyme-inducing effect of phenobarbital increases levetiracetam clearance, typically requiring higher levetiracetam doses to maintain effectiveness. Phenobarbital may also affect the metabolism of other medications your rabbit might need for concurrent conditions. Certain antibiotics, pain medications, and other drugs may have their effectiveness reduced when given with phenobarbital. Always inform any veterinarian treating your rabbit, including emergency veterinarians, that your rabbit is on phenobarbital therapy.

Other medications that may interact with phenobarbital include corticosteroids, which may be needed for various rabbit health conditions. The interaction between phenobarbital and steroids can reduce steroid effectiveness. Some antibiotics commonly used in rabbit medicine may have their metabolism affected by phenobarbital. Certain antiparasitic medications may also be affected. If your rabbit requires sedation or anesthesia for procedures, the anesthetic protocol may need to be adjusted for rabbits on chronic phenobarbital therapy, as both tolerance to and enhanced effects of sedatives can occur.

Supplements and other products generally used in rabbit care should also be disclosed to your veterinarian. While probiotics and most digestive supplements do not interact significantly with phenobarbital, some herbal products can affect liver enzyme activity or have their own sedative effects. Critical Care and recovery foods do not interact with phenobarbital directly but monitoring appetite and ensuring adequate nutrition is important during phenobarbital therapy. If you are considering adding any new supplements, medications, or products to your rabbit's regimen, check with your veterinarian first to ensure there are no concerning interactions with phenobarbital.

General precautions for phenobarbital use in rabbits emphasize the importance of proper veterinary oversight, consistent medication administration, and regular monitoring. Phenobarbital should only be used under the guidance of a veterinarian experienced with rabbit medicine, as dosing and monitoring protocols differ from those used in dogs and cats. Accurate weight measurement is critical because dosing errors in small animals like rabbits can have significant consequences. Adherence to the prescribed dosing schedule is essential, as inconsistent dosing can lead to subtherapeutic blood levels and breakthrough seizures. Never adjust the dose or discontinue phenobarbital without explicit veterinary guidance.

Breed-specific considerations with phenobarbital relate primarily to size variations among rabbit breeds. Dwarf breeds weighing two to four pounds require careful attention to dose accuracy, as small weight changes can translate to proportionally large dose adjustments. Liquid formulations at appropriate concentrations are often preferred for small rabbits to allow precise volume measurement. Giant breeds may require tablet formulations or higher-concentration liquids to provide practical dosing volumes. Regardless of breed, regular weight monitoring helps ensure appropriate dosing as your rabbit's weight may change over time due to the medication itself, dietary changes, or other factors.

Environmental and handling precautions are important for phenobarbital due to its controlled substance status. Store the medication securely where children, other pets, and unauthorized persons cannot access it. Phenobarbital has potential for human misuse and legal requirements apply to its handling and storage. Keep the medication in its original labeled container and note expiration dates. Clean up any spilled medication promptly and wash hands after handling. Do not share your rabbit's medication with other pets, as inappropriate use can be dangerous and is illegal for controlled substances.

Monitoring during phenobarbital therapy involves multiple components. Track your rabbit's appetite, water consumption, activity level, and overall demeanor daily, noting any changes from baseline. Monitor fecal pellet production for changes in quantity or consistency. Keep a detailed seizure diary recording any seizure events including date, time, duration, and characteristics. Attend all scheduled veterinary appointments for blood level monitoring and physical examination. Report any concerns to your veterinarian promptly rather than waiting for the next scheduled visit, as early intervention for problems typically leads to better outcomes.

Special populations requiring additional precautions include geriatric rabbits, who may have age-related changes in liver or kidney function affecting phenobarbital metabolism and elimination. Younger rabbits may require dose adjustments as they grow and their metabolism changes. Rabbits with concurrent health conditions require comprehensive management addressing all aspects of their health alongside seizure control. Post-surgical or debilitated rabbits may need modified monitoring. Pregnant and nursing does should be managed with careful consideration of the risks and benefits of anticonvulsant therapy during reproduction. Regular communication with your veterinarian helps ensure safe and effective phenobarbital therapy for all rabbit patients.

Proper storage of phenobarbital maintains medication effectiveness and complies with controlled substance regulations. Tablets should be stored at controlled room temperature, typically between 68 and 77 degrees Fahrenheit, protected from light and moisture. Keep tablets in their original container with the lid tightly closed. Oral liquid formulations may have specific storage requirements, so follow the instructions provided by your pharmacy. Some compounded preparations may require refrigeration while others should be kept at room temperature. Note the expiration date or beyond-use date and replace the medication before it expires to ensure effectiveness during potential seizure emergencies.

As a Schedule IV controlled substance, phenobarbital requires secure storage to prevent diversion or misuse. Store the medication in a locked cabinet, drawer, or safe that cannot be easily accessed by children, visitors, or other household members who should not have access. Keep records of when you receive the medication and track usage to ensure accountability. Your veterinarian may periodically request information about medication usage or remaining quantity. Never share your rabbit's phenobarbital with other pets or people, as this is illegal and potentially dangerous. If you have concerns about storing controlled substances in your home, discuss alternatives with your veterinarian.

Formulation-specific considerations apply to different phenobarbital preparations. Tablets are generally stable at room temperature when stored properly but should be protected from excessive humidity. Liquid formulations may be less stable than tablets and often have shorter expiration dates, particularly compounded preparations. Shake liquid formulations gently before each use to ensure uniform concentration throughout the bottle. Use the measuring device provided or a properly calibrated oral syringe for accurate dose measurement. Do not use household measuring spoons, as they are not sufficiently accurate for medication dosing. Check liquid medications periodically for any changes in color, consistency, or odor that might indicate degradation.

Disposal of unused or expired phenobarbital requires following controlled substance disposal regulations. Do not throw controlled medications in regular household trash or flush them down the toilet unless specifically instructed to do so. Many communities offer pharmaceutical take-back programs that accept controlled substances. Some pharmacies participate in these programs. The DEA sponsors National Prescription Drug Take-Back events periodically. If no take-back options are available in your area, ask your veterinarian or pharmacist for guidance on approved disposal methods. Document the disposal of controlled medications for your records. When your rabbit no longer needs phenobarbital or if you have unused expired medication, ensure proper and prompt disposal.

Most rabbit breeds respond similarly to phenobarbital without significant breed-specific variations in drug sensitivity or efficacy. The primary breed-related considerations involve size differences that affect dosing calculations and practical medication administration. All rabbit breeds can benefit from properly managed phenobarbital therapy when indicated for seizure control. Understanding how your specific rabbit's characteristics may affect treatment helps ensure optimal outcomes.

Dwarf breed rabbits including Netherland Dwarfs, Holland Lops, Mini Rex, and similar small varieties require particular attention to dosing accuracy. These rabbits typically weigh between one and a half to four pounds, meaning that small variations in weight translate to proportionally larger changes in appropriate doses. Weighing dwarf breeds in grams provides the precision needed for accurate dose calculations. Liquid phenobarbital formulations at concentrations suitable for small-volume dosing are often preferred for these patients. When doses fall between convenient tablet fractions, compounded preparations in specific concentrations may be needed. Regular weight monitoring is important as even small weight changes in dwarf breeds may warrant dose adjustment.

Giant breed rabbits such as Flemish Giants, Continental Giants, and French Lops present different practical considerations. These rabbits can weigh fifteen pounds or more, requiring larger absolute doses of medication. Tablet formulations may be more practical for giant breeds than liquid formulations, which would require impractically large volumes at standard concentrations. Alternatively, concentrated liquid preparations may be compounded for giant breed patients. The larger body mass of giant breeds means that small weight fluctuations have proportionally less impact on dosing than in dwarf breeds, though accurate weights are still important. Giant breeds should have their weight monitored regularly as part of overall health assessment.

Other breed-related considerations include body conformation factors affecting medication administration. Lop-eared breeds do not require special phenobarbital considerations beyond standard care. Rex breeds with thin or sparse belly fur may have altered thermoregulation that should be considered during phenobarbital therapy, as the medication can affect temperature regulation in some patients. Angora and wool breeds may have dense coats making visual assessment of body condition more difficult, requiring hands-on evaluation to monitor weight and condition during long-term therapy.

Age considerations apply across all breeds when managing phenobarbital therapy. Young growing rabbits may require periodic dose adjustments as their weight increases. Senior rabbits may develop age-related liver or kidney changes affecting phenobarbital metabolism and elimination over time. Giant breeds tend to have shorter lifespans and may show aging-related changes earlier than smaller breeds. Regardless of breed, individual variation in drug metabolism means that blood level monitoring remains important for optimizing therapy in each specific patient.

Several other anticonvulsant medications may be used as alternatives to or in combination with phenobarbital for seizure management in rabbits. Levetiracetam has become increasingly popular as both a monotherapy and adjunctive treatment option. It offers the advantage of minimal hepatic metabolism and fewer drug interactions than phenobarbital, making it an attractive option for rabbits with liver concerns or those requiring multiple medications. When combined with phenobarbital, levetiracetam often provides enhanced seizure control for rabbits not adequately controlled on phenobarbital alone. The dose of levetiracetam typically needs to be increased when used with phenobarbital due to enzyme induction effects.

Potassium bromide represents another established anticonvulsant that may be used alone or in combination with phenobarbital. Unlike phenobarbital, potassium bromide is not metabolized by the liver, making it potentially suitable for rabbits with hepatic concerns. Potassium bromide has a very long half-life and takes weeks to reach steady-state blood levels. It may cause sedation and increased thirst similar to phenobarbital. Zonisamide is a newer anticonvulsant option that may be considered when other medications are not effective or well-tolerated. Emergency seizure medications such as midazolam or diazepam work through different mechanisms and serve as rescue medications for active seizures rather than maintenance therapy.

Complementary therapies support overall health during chronic anticonvulsant therapy. Probiotics help maintain healthy gastrointestinal function, which is always a priority in rabbit medicine. Ensuring adequate nutrition through unlimited hay, appropriate fresh vegetables, and quality pellets supports rabbits on long-term medication. Some practitioners recommend liver-supportive supplements for rabbits on chronic phenobarbital therapy, though the evidence for their benefit is limited. Maintaining a consistent environment, minimizing stress, and avoiding known seizure triggers complement pharmacological therapy. Critical Care or similar recovery foods should be available if appetite decreases.

Never substitute or modify anticonvulsant medications without explicit guidance from your rabbit-savvy veterinarian. Transitions between anticonvulsant medications require careful protocols to prevent withdrawal seizures from discontinued drugs and breakthrough seizures during adjustment periods. Each anticonvulsant has different pharmacokinetics, drug interactions, monitoring requirements, and side effect profiles that must be considered. If your rabbit's seizures are not adequately controlled on current therapy, discuss options with your veterinarian rather than making changes independently. The goal is to achieve optimal seizure control while maintaining the best possible quality of life, and this often requires patience and close collaboration between owners and veterinary professionals.