A few weeks ago I started using hartz flea and tick spray on my cat Stubs the first day I sprayed him he ran away for a day when he came back he was never the same. He was kind of sick I just thought he needed some TLC, SO HE STAY INSIDE today we took a nap together this morning. A few hours later he came stumbling down stairs meoww sounded wierd so I checked him he looked horrible. He was so sick , you see I sprayed him again because his fleas were back plus he was sick so I did not want him to worry about fleas. I sprayed him agaim TWO DAYS AGO. I took him to the vet he is gone now.