Remove card http://myvidster.fun/ myvidster.com More berries for bears may mean a boon for ranchers as well. Ripple and his colleagues note in their paper that just before the grizzly bear went extinct in the American Southwest in the 1900s, the bears tended to go after livestock. One explanation for the grizzly bearâs increased taste for beef and mutton is that livestock grazing eradicated the bearsâ plant-based food sources, the scientists say. So, if you keep a bear supplied with berries, you may have fewer worries about your cows.