Warmblood Fragile Foal Syndrome (WFFS, PLOD1)

Hereditary connective tissue disorder of the Warmblood through a mutation in the PLOD1 gene (disturbed collagen cross-linking), inherited autosomal-recessive. Affected homozygous foetuses are mostly aborted or come into the world with extremely vulnerable, tearing skin and overextensible joints; the form is regarded as predominantly lethal. Carriers are clinically unremarkable and relatively frequent in Warmbloods.

Veterinary care required

This condition belongs in veterinary diagnosis and treatment. Compounds are at most supportive.

Priority · vet & management

For breeding, the gene test of both parent animals (PLOD1) is the decisive lever to avoid carrier-x-carrier matings. An affected foal or an abortion belongs under veterinary supervision; WFFS is not curable, animal-welfare-appropriate decisions are in the foreground.

Possible causes

· autosomal-recessive mutation PLOD1 c.2032G>A (lysyl hydroxylase defect)
· only homozygous foetuses/foals affected; carriers clinically healthy
· relatively high carrier frequency in Warmblood populations described
· predominantly lethal course (abortion or euthanasia at birth)

Supportive compounds · supplementary feed, not medication

Prevention

Gene testing of Warmblood breeding animals and targeted mating (no carrier x carrier) prevent affected foals.

Equiterna's take

Equiterna handles WFFS factually and honestly as a predominantly lethal hereditary trait: the PLOD1 gene test and well-thought-out breeding management are clearly in the foreground — complementary feeds play no role.

Usage note

This content is for information and education. It does not replace veterinary diagnosis or treatment. If your horse shows signs of illness, consult a veterinarian.

Equiterna is an intermediary platform for equine knowledge, marketplace and tools — not a veterinary-medicines dealer, veterinary practice or pharmacy. Compound information is study-attributed and free of healing claims. Legal framework: Regulation (EU) 2019/6 / TAMG (DE/AT), Feed Regulation (EC) 767/2009, FEI Prohibited Substances List, HWG.