I'll be so glad when they finally take this off the market. I still see the hartz flea drops being sold in grocery stores and pet stores. I only used it one time and luckily my cats didn't have a bad reaction to it. I then learned how bad it was and I threw out the rest of the flea drops. I've tried to spread the word to others and it's horirible to know that so many animals have died or suffered because of this terrible product. I've also heard that Bio-Spot can cause harm in animals too. Now I only stick with products that vets sell like advantage.