Many bears at roadside zoos spend many of their waking hours pacing, head-butting the cages, and engaging in other abnormal behavior indicative of chronic distress. The U.S. Department of Agriculture (USDA) has been ignoring bears and ignoring how much space they need and what they need to eat in order to be healthy.
https://secure.peta.org/site/Advocacy?cmd=display&page=UserAction&id=4351