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.

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