Smudge gets C.E.T. Oral Health Chews as a preventative - not sure how helpful they'd be once a cat already had stomatitis/gingivitis, but they're not hard to find (I usually order them online) and come in both fish and chicken flavors. He's never had mouth problems, but he ate only dry food until he moved in with me. When he started eating canned as well, I started giving him the chews. He can't always get his mouth around a whole one, so I cut them in half with scissors. He says the fish ones taste pretty good.

Love, Columbine