My 7 month old kitten had fleas all over, we tried many times to get rid of the flea with spray and collars. We finally tried to apply the Hartz powder product onto the cat as directed. Barley 24hrs after application he had a seizure lasting 15 seconds at my feet. I scooped him up and kept him steady as to prevent further damage and phoned a vet immediately. There was no other episodes of him seizing but as he tries to sleep he would go completely limp and eyes would remain open, only showing the third eyelid. He will twitch ferociously the face, whiskers, paws and entire body. We are paying 500+ dollars in vet bills and dealing with emotional trauma for our poor baby. Please don’t use products on your animals.