Description    Chronic Selenium Toxicity is generally limited to areas with high soil selenium, but can be caused by excessive supplementation of the diet. Characteristic signs include hair loss and hoof deformities. Lesions at the base of the horns can occur.
Species   Bovine
Signs   Alopecia, Anorexia, Cool nail, claw, hoof, Diarrhea, Dullness, Female infertility, Forefoot pain, Forefoot swelling, Forelimb lameness, Forelimb pain, Generalized lameness or stiffness, Hindfoot pain, Hindfoot swelling, Hindlimb lameness, Hindlimb pain, Nail, claw, hoof sloughing, Reluctant to move, Rough hair coat, Skin hypopigmentation, Splitting nail, claw, hoof, Underweight, poor condition, thin, emaciated, unthriftiness, ill thrift, Weight loss
References   Cowan V. Characterizing 1341 cases of veterinary toxicoses confirmed in western Canada: A 16-year retrospective study. Can Vet J 2016;57:53 [Web Reference]
Davis TZ. Toxicokinetics and pathology of plant-associated acute selenium toxicosis in steers. J Vet Diagn Invest 2012;24:319 [Web Reference]
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