Well, Tilly went into the vet this morning. The vet really isn't worried about Tilly's chin or anything, but she did give me some Prednisone because the peroxide soap isn't helping and the acne is getting worse. She said that in very severe cases they can do a long acting cortizone injection (it started with a "D" but I can't remember what she called it) but it can make cats diabetic!!! So I said we weren't going with that option unless it was dire straights!!! Anyway, she's acting normal and eating and everything, so I'm not worried (anymore). Phew.. it's always great to get a good review from the white coat!!