Hoof wall separation disease: A Review.
Authors: Finno Carrie J
Journal: Equine veterinary education
Summary
Hoof wall separation disease (HWSD) represents a significant genetic concern within the Connemara pony breed, caused by a frameshift mutation (c.504_505insC) in the SERPINB11 gene that segregates as an autosomal recessive trait. Clinical manifestations—progressive dorsal hoof wall separation and cracking leading to chronic inflammation, lameness and secondary laminitis—typically emerge within the first six months of life, with carrier frequency within the breed estimated at 14.8%, whilst the mutation remains absent in other equine populations to date. Although no curative treatment exists, a combination of targeted therapeutic farriery, specialised shoeing systems and careful environmental management can substantially mitigate disease severity and improve functional outcomes in affected ponies. The availability of DNA testing for HWSD now permits informed breeding decisions and is mandatory for all new Connemara pony registrations, making genetic screening an essential tool for breed associations and individual breeders seeking to reduce disease prevalence. For practitioners managing affected ponies, understanding the progressive nature of the condition and the limitations of current interventions is crucial for setting realistic expectations with owners and implementing evidence-based management protocols tailored to individual cases.
Read the full abstract on PubMed
Practical Takeaways
- •Farriers should recognize HWSD clinical presentation (dorsal hoof wall separation and cracking) in young Connemaras and coordinate care with veterinarians; targeted hoof care and specialized shoeing can help manage severity
- •Genetic testing is now mandatory for Connemara breed registrations—practitioners should be aware that homozygous carriers show disease while heterozygous carriers are clinically normal
- •Environmental management may reduce disease severity in affected ponies; work with owners and veterinarians on comprehensive management strategies combining hoof care, shoeing, and stable management
Key Findings
- •HWSD is an autosomal recessive genetic defect in Connemara ponies caused by a frameshift mutation (c.504_505insC) in the SERPINB11 gene
- •Clinical signs typically manifest within the first six months of life in homozygous affected ponies
- •Carrier frequency in the Connemara breed is estimated at 14.8%, with the mutation not identified in other breeds
- •Management through targeted hoof care and special shoeing may be beneficial, though no definitive cure exists