What levels of prussic acid are toxic to livestock?
The toxicity level of prussic acid has been referenced at varying levels. One source from the University of Saskatchewan indicated that toxicity can occur should the level of prussic acid exceed 200 mg/kg (ppm) on a dry feed basis. Another sources from Kansas State indicates that the feed is generally safe for consumption at 0-500 mg/kg dry matter, potentially toxic and should be blended at the 600-1000 mg/kg dry matter and dangerous to cattle at greater than 1000 mg/kg dry matter. The Merck Veterinary Manual suggests that processed forages and standing plants containing less than 500 mg/kg dry matter are considered safe; 500-750 mg/kg dry matter is cautionary and greater than 750 mg/kg dry matter is extremely hazardous. What are the symptoms of prussic acid poisoning? Reactions to prussic acid poisoning are swift and lethal. Livestock poisoned from prussic acid usually tend to die within several minutes of consumption. Symptoms include laboured breathing, staggering, excessive salivat
