I gave my cat Hartz mite drops 3 days ago. He wouldn’t eat, drink or use the litter box .He also had trimmers and a puny meow. My husband and I couldn’t figure out what was wrong with him until we stumbled upon this website tonight. I had heard here and there that it Hartz might be harmful but never thought it came from a valid source, I thought it was just hear say. I just can’t believe that a company would and could do this to animals. It’s going on the fourth day now with not much improvement. Thanks Hartz. I’m lucky that my cat is alive.