The Food and Drug Administration is asking pet owners and licensed veterinarians to help them track down information on why hundreds of dogs and cats have died since 2007 from eating poisonous jerky treats.
About 600 have died and 3,600 have been sickened, and the numbers have appeared to rise since January.
The affected jerky seems to be chicken, duck, sweet potato and fruit-flavored varieties. Most seems to have been made in China; however, pet food manufacturers are not required by U.S. law to state the country of origin for each ingredient in their products.
“This is one of the most elusive and mysterious outbreaks we’ve encountered,” FDA Center for Veterinary Medicine Director Bernadette Dunham said in a statement on the agency’s website.
If you want more information on what to look for when buying treats, a list of symptoms, or to send information to the FDA, click here.