Hi, any advice welcome. We have a 14 months old collie. Lately he is not letting me trim his claws. He did previously let me trim them if I put some peanut butter on a spoon to distract him and once he just lay there and let me trim them all. I have never drawn blood by accident or anything. Now he has decided he won't allow it anymore!! Have tried giving him frozen treats, using a dremel instead of the clippers. He won't hold still!! I don't want to run to the groomer as it was going so well before...Any advice? Is is just a teenage rebellious phase?