ZINC TOXICITY IN CATTLE AND SHEEP
 
Description    Several episodes of zinc toxicity in cattle and sheep have been described. Sources of zinc included the accidental addition of zinc oxide to cattle feed, galvanized wire and troughs, heavy use of zinc-containing fertilizers and fungicides, milk replacer containing large amounts of a zinc supplement, and home-made molybdenum licks.
 
Species   Bovine, Ovine
 
Signs   Abdominal distention, Agalactia, Anorexia, Arrhythmia, Bloat in ruminants, Chemosis, Colic, Constant or increased vocalization, Decreased amount of stools, absent feces, constipation, Dehydration, Diarrhea, Dullness, Exophthalmos, Generalized weakness, Grinding teeth, Icterus, Lack of growth or weight gain, Nystagmus, Pale, Pica, Polydipsia, Polyphagia, Polyuria, Rough hair coat, Seizures or syncope, Skin edema, Sudden death, Tachycardia, Underweight, poor condition, thin, emaciated, unthriftiness, ill thrift, Weight loss
 
References   Cummings JE. The ubiquitous role of zinc in health and disease. J Vet Emerg Crit Care 2009;19:215 [Web Reference]
Sharpe RT. Surveillance of suspect animal toxicoses with potential food safety implications in England and Wales between 1990 and 2002. Vet Rec 2005;157:465
Osweiler GD. Toxicology. Vet Clin N A Food Anim Pract 2000;16:409
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