Pea mania: deranged behaviour in cattle grazing a pea crop (Pisum sativum var arvense) |
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| Authors: | Reardon C J McKenzie R A |
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| Institution: | Warwick Veterinary Clinic, 65 Grafton Street, Warwick, Queensland 4370. wvc@flexi.net.au |
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| Abstract: | Hypersensitivity to external stimuli, progressing in some animals to manic behaviour, occurred in a cattle herd that grazed a crop of field peas (Pisum sativum var arvense) in the pre-flowering stage. Haematological and biochemical analyses eliminated hypomagnesaemia and ketosis as diagnoses. Other than two steers euthanased due to injuries sustained during manic episodes, all affected animals survived, recovering over 3 days when moved to alternative pasture. No necropsies were conducted. No microbial pathogens or endophytes were found on or in the plants. A previously reported incident in Victoria in 1987 in cattle grazing peas appeared to be of a similar nature. Environmental factors leading to these incidents were not clearly identified. |
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