The paw pads play a vital role in cushioning impact, providing traction, and protecting the bones and joints of the limbs during movement. In dogs affected by HFH, a genetic mutation disrupts normal keratin regulation in the skin. As a result, the outer layer of the footpads (stratum corneum) produces excessive keratin, leading to thickened, hardened, and sometimes cracked pads over time.
Clinical signs of HFH typically appear in young dogs, often within the first months of life. Early symptoms may include slightly rough or dry paw pads. As the condition progresses, the pads become increasingly thickened, hard, and cornified. The surface may appear uneven, cracked, or calloused, and in severe cases, painful fissures can develop.
Affected dogs may show signs of discomfort while walking, especially on rough or hot surfaces. They may also lick or chew their paws due to irritation or pain. Secondary infections can sometimes occur if cracks in the skin allow bacteria to enter. Despite the visible skin changes, HFH does not typically affect internal organs or overall lifespan, but it can significantly impact comfort and mobility if severe.
The HFH DNA Health Test is designed to detect the specific genetic mutation responsible for Hereditary Footpad Hyperkeratosis. The test is simple, safe, and non-invasive, typically performed using a cheek swab or blood sample. The collected DNA is analyzed in a specialized laboratory to determine whether the dog carries zero, one, or two copies of the mutation. Because genetic information remains unchanged throughout life, testing can be performed at any age, including in puppies before symptoms develop.
Results are generally reported as:
- Clear (Normal): The dog does not carry the HFH mutation and is not expected to develop hereditary footpad hyperkeratosis or pass it on to offspring.
- Carrier: The dog carries one copy of the mutation but typically does not show clinical signs. However, it can pass the mutation to future generations.
- Affected/At Risk: The dog carries two copies of the mutation and is likely to develop thickened and hardened footpads associated with HFH.
Genetic testing for HFH is highly valuable for breeders, veterinarians, and dog owners. Breeders can use results to avoid carrier-to-carrier matings, helping reduce the incidence of this condition in future generations while maintaining healthy genetic diversity within the breed population.
For dog owners, knowing a dog’s genetic status allows for early management and care. While there is no cure for HFH, supportive treatments such as regular paw maintenance, moisturizing balms, careful trimming of excess keratin, and protection from harsh surfaces can help reduce discomfort and prevent complications.
The Hereditary Footpad Hyperkeratosis (HFH) Health Test is a reliable genetic screening tool that supports responsible breeding practices, promotes canine skin and paw health, and helps reduce the impact of this inherited dermatological disorder in future generations.
