Daniff

The Daniff is a cross between the Great Dane and the Mastiff. Because each hybrid inherits a unique combination of traits from both parents, we recommend thoroughly researching both breeds before choosing a Daniff. Pay special attention to temperament, health issues, and care requirements, as your dog may express characteristics from either parent breed.

Great Dane

Great Dane

The Great Dane is among the world's tallest dog breeds, combining impressive height with a powerful, well-muscled physique that conveys elegance rather than clumsiness. Males stand at a minimum of 30 inches at the shoulder, with 32 inches or more being preferred, while females measure at least 28 inches, with 30 inches or more preferred. Despite the absence of a specified weight in the breed standard, males typically weigh between 140 and 175 pounds, with females ranging from 110 to 140 pounds. The body is square-proportioned, with the length from the point of the shoulder to the point of the buttock being equal to the height at the withers. The Great Dane's head is long, distinguished, and expressive, with a full, square jaw and a well-defined stop. The skull is flat on top and parallel to the bridge of the muzzle when viewed in profile. The eyes are medium-sized, deep-set, and almond-shaped with an intelligent, alert expression. Eye color is typically dark, though lighter eyes are acceptable in harlequin and merle patterns. The ears are set high and medium in size, folding forward close to the cheek when natural, or cropped to stand erect in regions where this practice is permitted. The neck is long, well-arched, and muscular, flowing smoothly into well-laid-back shoulders. The coat is short, thick, and smooth with a glossy appearance. Seven colors are recognized by the American Kennel Club: brindle, fawn, blue, black, harlequin, mantle, and merle. Brindle features a yellow-gold base with strong black cross stripes in a chevron pattern. Fawn is a yellow-gold color with a black mask. Blue is a pure steel blue shade. Black is a glossy, pure black. Harlequin displays a white base with irregularly shaped black patches. Mantle shows black and white with a black blanket extending over the body. Merle presents a pale gray to dark gray base with black torn patches. The tail is set high, thick at the base, and tapers to a point, carried in line with the back or slightly curved upward.

Key Characteristics

Temperament
Temperament Temperament Temperament Temperament Temperament Temperament Great Danes exhibit a watchful, alert nature and can be effective deterrents simply through their impressive appearance, though they rarely bark without reason. They are typically friendly toward strangers once properly introduced but may initially display reserved or aloof behavior. Some Great Danes can be prone to separation anxiety due to their strong attachment to their families. The breed generally coexists peacefully with other household pets, particularly when raised together, though early socialization is important. Male Great Danes may occasionally show dominance or territoriality toward unfamiliar male dogs.
Health Considerations
Health Considerations Health Considerations Health Considerations Health Considerations Health Considerations Health Considerations Other health concerns include hypothyroidism, where the thyroid gland underproduces hormones, causing weight gain, lethargy, and skin problems. Wobbler syndrome, affecting the cervical spine, can cause neck pain and an unsteady gait. Bone cancer, particularly osteosarcoma, occurs at higher rates in giant breeds. Happy tail syndrome results from repeated injury to the tail tip from vigorous wagging against hard surfaces. Great Danes may also develop cataracts and other eye conditions. Feeding a large-breed puppy formula during growth helps moderate development and may reduce the risk of skeletal problems. Regular veterinary checkups are essential for early detection and management of these conditions.
Learn More About The Great Dane

Mastiff

Mastiff

The Mastiff, also known as the English Mastiff or Old English Mastiff, is a massive, powerful dog that ranks among the heaviest of all canine breeds. The breed standard specifies minimum heights of 30 inches for males and 27.5 inches for females, though many individuals exceed these dimensions, with some reaching 36 inches at the shoulder. Weight varies considerably, with males typically ranging from 160 to 230 pounds and females from 120 to 170 pounds. The record-holding Mastiff, named Zorba, weighed an astounding 343 pounds. The body is massive, with great depth and breadth, particularly between the forelegs, which are set wide apart. The Mastiff's head is heavy, broad, and square in appearance, with a short, broad muzzle that is approximately one-third the length of the entire head. The forehead is flat with pronounced wrinkles when alert, and there is a distinct stop between the eyes. A characteristic black mask covers the muzzle, extending around the eye orbits and between the eyes, with the ears also being dark. The eyes are medium-sized, set wide apart, and display a kind but alert expression, with colors ranging from brown to dark hazel depending on coat color. The ears are small, V-shaped, set high on the sides of the head, and hang close to the cheeks. The coat is short, straight, and close-lying with a coarser outer coat over a denser, shorter undercoat. Accepted colors include fawn, apricot, and brindle, all featuring the essential dark mask. Fawn ranges from light cream to deep golden tan, while apricot presents a richer, more orange-toned shade. Brindle shows fawn or apricot as the background color, covered with dark stripes. A small patch of white on the chest is permissible. The tail is set on high, wide at the base, and tapers to a point, reaching to or slightly below the hocks. At rest, the tail hangs straight down; in motion, it forms a gentle curve but never rises above the level of the back.

Key Characteristics

Temperament
Temperament Temperament Temperament Temperament Temperament Temperament Mastiffs have relatively low energy requirements despite their size and are often described as couch potatoes who enjoy relaxed lifestyles. They require moderate daily exercise, typically satisfied by walks and play sessions, but are not demanding of vigorous activity. Mental maturity comes slowly in Mastiffs, with full physical and emotional development not reached until approximately three years of age. Owners must be patient during the sometimes boisterous adolescent phase. The breed responds well to calm, consistent training using positive reinforcement but can be stubborn and may appear to respond in slow motion. Mastiffs do not tolerate extended periods alone and may develop behavioral issues if isolated from their families.
Health Considerations
Health Considerations Health Considerations Health Considerations Health Considerations Health Considerations Health Considerations Mastiffs are susceptible to various eye conditions including entropion and ectropion, where the eyelids roll inward or outward respectively, as well as progressive retinal atrophy and cataracts. The facial folds characteristic of the breed require regular cleaning to prevent skin infections. Cystinuria, a urinary condition causing stone formation, occurs more frequently in Mastiffs than in most other breeds. Hypothyroidism and various cancers, including osteosarcoma, affect the breed. Epilepsy has been reported, and affected individuals often have difficulty tolerating standard anti-seizure medications. Regular veterinary checkups, proper nutrition using large-breed formulas, weight management, and awareness of emergency signs are essential for Mastiff owners.
Learn More About The Mastiff

Important to Remember

Each hybrid dog is unique and may inherit any combination of traits from either parent breed. The information above represents the characteristics of the purebred parent breeds. Your Daniff may favor one parent over the other or display a blend of both. We strongly encourage you to read the complete breed profiles for both the Great Dane and Mastiff to fully understand the range of possible temperaments, health concerns, and care requirements.