We have 2 cats and 1 dog and we have used hartz products before on all of our animals without ever having any problems. I stumbled across this website today after buying another flea collar for one of my cats because I had heard about one of the flea products harming animals and I wanted to double check to make sure it wasn’t the one I purchased today. I have read many post from different people and read some horrible and painful stories. I am such an animal person and love all types of animals my heart was breaking for all the victims of these hartz products. After reading some posts I immediately took off the collar and threw it in the trash along with shampoos we had in our house. We personally have never had any issues with these products but because of everyone elses horrific stories I will not be purchasing any more hartz products in the future and I believe this company needs to be shut down and all of their products need to be removed off of all shelves!