She isn’t even a year old yet. I definitely believe in brushing a dog’s teeth and I have been working on it with her, but I have never had a dog give me such trouble in doing so. The 2nd time I tried she wouldn’t let me touch her mouth for an hour after I was done and I was gentle, let her taste the toothpaste and took my time with her. I don’t think she likes the way it feels on her gums…I don’t want her to get to where she won’t let me touch her mouth and open it because right now she is fine when I handle her. I did find if I put the toothpaste on the brush and kinda let her chew on it on her own, but make slight movements with it she is ok, so it doesn’t do the best job, but it is better than not doing it at all. I can’t use the finger brush anymore because she has all her adult teeth and tried to chew on that piece, but doesn’t realize my finger is in there…so that doesn’t work either.