Flea collars are very bad for cats and dogs. Last summer my MIL put a flea collar on her cat after I advised her not to. Well needless to say she called me crying because her cat lost of the hair around his neck were the flea collar was. He looked kind of silly for awhile, but it did grow back. My vet told me never to use them because some flea collars have been known to cause tumors and irritate the skin. |