Limb deformities in foals associated with ingestion of locoweed by mares
McIlwraith, C.W.; James, L.F.
Journal of the American Veterinary Medical Association 181(3): 255-258
1982
ISSN/ISBN: 0003-1488 PMID: 7107503 Document Number: 190945
Five of 26 pregnant mares observed ingesting locoweed (Astragalus mollisimus) subsequently aborted and another 10 produced foals with various limb deformities. Seven of the foals had deformities of a flexion-extension type and 3 had angular deformities. Four foals were normal. The limb deformities either resolved spontaneously (5 cases) or were treated successfully (in 4 of the other 5 cases). Diagnosis was based on evidence that the mares had eaten the plants, and the similarity of the syndrome to that previously reported in sheep and cattle.