Someone had a thread about the dangers of Hartz shampoo (I guess it was the flea/tick one?). If you go to the search module on this website and type in Hartz, you'll find it. There is also a website that talks about the Hartz controversy. If you can't find it, let me know and I'll try to find it for you. I'm leaving for the day in about 15 minutes so if you can't find, I'll find it for you tomorrow.