A mysterious jerky treat-related illness that has killed more than 500 dogs and cats and sickened thousands more has prompted to U.S. Food and Drug Administration to request the help of pet owners.

On Tuesday, the FDA asked pet owners and veterinarians to contact them if their dog or cat has become ill after eating jerky pet treats — packaged snacks made of chicken, duck, sweet potatoes or dried fruit.

At least 3,600 dogs and 10 cats have become ill after eating jerky treats since 2007, according to the FDA. Of those cases, 580 have involved the death of a pet.