A “bully whippet” refers to a specific type of Whippet dog characterized by an unusually muscular physique. The term “bully” describes their robust build, not their temperament. These dogs are purebred Whippets, distinct from standard Whippets due to their appearance.
Understanding the Bully Whippet
The distinct muscularity of a “bully whippet” stems from a naturally occurring genetic mutation. This mutation affects the myostatin gene (MSTN), leading to a functionally inactive myostatin protein.
Myostatin typically acts as a negative regulator of muscle growth. When this protein is deficient, as in “bully whippets,” the body produces a greater quantity of muscle fibers. This leads to increased muscle mass, a broader chest, and more defined musculature. This “double-muscled” phenotype is a genetic anomaly, not a result of selective breeding for aggression or an unhealthy trait.
Health and Temperament
Despite their imposing muscular appearance, “bully whippets” generally retain the gentle, affectionate, and docile temperament characteristic of the Whippet breed. Their personality is not affected by the myostatin mutation.
Health considerations associated with the myostatin mutation vary depending on the number of gene copies inherited. Whippets with two copies of the “mh” (mutant) allele, known as homozygous individuals, exhibit the pronounced “bully” phenotype. They may experience muscle cramping in their shoulders and thighs, and some may also present with an overbite (prognathism). While their organs are typically normal-sized, the increased muscle mass can potentially strain organs like the heart, necessitating monitoring. Whippets carrying only one copy of the “mh” allele (heterozygous) are generally more muscular than typical Whippets and are often faster in racing, yet they do not display the extreme “bully” appearance and usually have no significant health issues related to the mutation.
Living with a Bully Whippet
Caring for a “bully whippet” largely aligns with the general care requirements for standard Whippets, though some adjustments may be beneficial due to their increased muscle mass. They require regular exercise, similar to other Whippets, including daily walks and opportunities for sprinting in secure, enclosed areas. While their powerful build might suggest a need for excessive exercise, they are not typically more demanding than other Whippets in terms of physical activity.
Their diet may benefit from a high-quality protein content to support their increased muscle mass, though standard nutritionally balanced dog food is generally suitable. Portion control is important to maintain an ideal weight for their lean frame. Given their gentle disposition, “bully whippets” are suitable as family pets. Genetic testing for the myostatin mutation before breeding is recommended to understand a dog’s genetic status and help prevent the birth of homozygous “bully” puppies.