After receiving a topical treatment of Hartz Flea control for cats, one of my cats began having seizures. My veterinarian advised washing off the medication which did improve her condition. I contact Hartz with a complaint about the danger of this product after internet research led me to evidence that Hartz markets the same product for cats and dogs but just different labels despite the fact that this chemical has been found to be toxic to cats. I received no response to my complaint and this product continues to be marketed as safe for cats.