hi was reading all the stories about hartz flea and tick for cats and i didnt put 2 and 2 together till i read the stories. i use the medicine on my 7 yr old cat and wondered why her fur was falling out and she had scabs on neck and head, i just thought maybe she was allegic to the puppy we had just got but now maybe im not so sure. i will not buy this product again thank god she wasnt killed, sorry for all your other losses. thanks for the info too!!!!!!!!!!!!