I recently noticed Harley has a little swelling - sort of like a boil on his lower gum. It does not look like pus is in there...just a swelling like I get at times - I get ginvingitis but it goes away after flossing and swishing Listerine. Naturally I can't use any such thing on a cat. He is not quite 2 years old and his teeth are not that bad - I don't see any cavities. Has anyone any knowledge of gum problems in cats, what they can be caused by and how they should be treated? P.S. I am reluctant to take him to the vet...he is an ex-feral (I've had him for 3 months - he tested FIV neg, neutered) he is bonded to me but I doubt he'll let anyone else look into his mouth!