The vet checked her mouth pretty thoroughly and didn't see any problems. From what I could see her teeth and gums look great. Of course there could still be a hidden problem in her mouth so I will watch her closely. She did have an ulcer on her lip last year when I took her in and they gave her an injection which cleared it up immediately. I had changed her food right before that and the vet felt that was the cause. I changed her back at that point and every thing has been fine since.