When I took Sydnee in to get her butt trimmed, moi is to nervous to get near her precious with clippers. I ask my groomer about getting her grooming and she said that 12 weeks was when she liked to start. She never said anything about her shots, however most puppies have all their shots by then don't they? Sydnee only has one left to go which will next week.
Maybe its just a law or something for your state or your groomer's personal attitude towards what age she wants to handle them and if they have all their shots.
