Researchers simulated a wolf encounter that included dogs. Photo by Reinaldo Cooke.
Researchers simulated a wolf encounter that included dogs.

Cows witnessing wolf attacks suffer PTSD-like symptoms

Oregon researchers have heard ranchers' anecdotes that cows that come in contact with wolves eat less, are more aggressive and are sicklier.

Cows that have witnessed wolf attacks display physical signs associated with post-traumatic stress disorder (PTSD), according to a new study by Oregon State University.

PTSD is a psychological disorder that develops in some people who have experienced a shocking, frightening or dangerous event. This is the first study of its kind to reveal PTSD biomarkers in cattle. The findings were published in the Journal of Animal Science.

“Wolf attacks create bad memories i

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