8 weeks ago We had a cat we took in as a stray when we moved to our new house 3 years ago he looked to be a few years old he was in excellent health . He was an indoor / outdoor cat never had a problem with fleas but when he did we used a product from Wal- mart …..A few weeks before he died he had a massive problem with fleas and all that was sold at our local grocer was Hartz flea and tick spray for cats. We couldn’t get to Wal-mart so we bought the Hartz. Within 2 weeks he lost so much weight, wouldn’t eat just layed around and we thought ” he was just old ” or caught a cold , until I saw this site on Facebook I never imagined a well known flea product could possibly kill our cat. My husband is now blaming himself and saying he killed our cat. We had a container of flea and tick powder we used on our new kitten a few weeks ago and now I am wondering if she will be ok , this too was from Hartz I threw it away I want nothing to do with Hartz products ever again and will never recommend it to anyone I know. Our cat went from a healthy ” fat cat” to a bag of bones on the day he died. All within 2 weeks.