The study that I was referring to was done was part of a study done by the eastern slopes cattleman’s association. They were studying predation on cattle and this was a byproduct of the study. It was noticed that the ravens would work as a group to draw mom away and the would ripe open a hole just past the last rib and pull out the intestines, then wait for calf to die. This was even happening to calves a couple of weeks of age.
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