Hello. I have a senior rescued Persian cat that has very weak hips. I just took him to the groomer for a lion cut. When he got home, he trembled for two days either because of the experience itself or the pain that the grooming caused him. Consequently, I want to learn how to groom him myself. Can you please tell me what is/are the best manufacturer or manufacturers of cat grooming/clipping kits that included an instructional dvd? Or is there a separate dvd or book that would teach me how to groom a cat? Thanks, Ken B.