Some of them just have really bad teeth. You might want to use a different toothpaste. What are you using now, and what do you brush them with? Someone suggested giving treats as you go along to keep them calmed down. I think that was a good idea. I cut my son's dogs nails and I always have to give her treats, so she doesn't think about what I'm doing.
__________________  Susan, Piper ,Harley & Suiki |