The Food and Drug Administration is stepping up its investigation into the deaths of hundreds of dogs that ate jerky treats, the agency said Wednesday.
Since 2007, roughly 3,600 dogs — and 10 cats — have taken ill after consuming the treats, according to reports received by the agency. About 580 of the animals died.
U.S. regulations do not require companies to disclose the origin of the ingredients they use to make pet food.
The reports have prompted repeated alerts warning the American public about the apparent danger, and sparked an FDA probe extending beyond U.S. borders. The agency has conducted some 1,200 tests, visited jerky pet treat manufacturers in China — where most of the treats are made — and sought help from academics, industry officials, foreign governments and state laboratories.