FLAGSTAFF, Ariz. – There is an epidemic in an old gold mining town in western Arizona: The wild burros that roam the town's single street are overweight, with rolls of fat on their necks and big, full bellies. But don't blame them. They'll eat anything. It's the half million tourists who visit tiny Oatman each year. They're the ones who have been feeding these critters carrots, hay or anything else, the U.S. Bureau of Land Management says.