sentences:  Chenango Valley Pet Foods expands its recall to foods that do not explicitly contain wheat gluten or rice protein, citing cross-contamination with those ingredients in the manufacturating process.For the first time, a non-cat or dog pet food is recalled since the list includes ferret food.Researchers at the USDA Bee Research Laboratory and the FDA Center for Veterinary Medicine begin investigating bee feed for the presence of melamine-related compounds as a possible cause of Colony Collapse Disorder – the unprecedented die-off of a quarter of the honeybees in the United States during 2006 that endangers the human food supply.