"Chewable products that protect dogs and cats against fleas can cause neurological problems such as stumbling or seizures, and pet owners need more warning, the Food and Drug Administration said Thursday.
The FDA issued an alert to owners and veterinarians and said it was requiring clearer labels on the products.
The flea pills and chews all contain a pesticide called isoxazoline, the FDA said. They include products sold under the brand names Bravecto, Nexgard and Simparica."
Source: NBC News, 09/21/2018