This is HORRIBLE! My poor cat has terrible burns around her neck because a few days ago I put on a Hartz flea collar on her. The poor thing is seriously hurt. This is not acceptable, I had no idea this could have happen to her. I am shocked to see that this is happening to other people’s pets. WHAT IS HARTZ DOING ABOUT THIS?? My cat, Smores, is a very sweet and loving member of my family and I am mortified that I put this darn collar on her.