Wary customers at North Valley grocery stores keep a watchful eye after several shoppers were recently threatened by three brazen coyotes. The animals were killed after they were trying to snatch white grocery bags from customers at a Fry's supermarket at Tatum Road and Cave Creek Road. "Coyotes are very smart animals," said Kriselle Colvin with Arizona Game & Fish. "Once they know where food source is, they know white bags have food in them, so they'll go up and grab them," Colvin said. One of the biggest reasons for the problem is well-meaning people feeding them, Colvin said. In...