I've always groomed my yorkie at home, but he hates it and I feel horrible doing it. His hair had gotten long and tangly, and I didn't think I'd ever be able to cut the hair around his face. I finally decided to bring him in to Petsmart to get him pampered (grooming includes a massage ). It took almost 5 hours before I got him back. He cried and barked pretty much the entire time the groomer was cutting his hair. The full service groom was $38. I wasn't sure what the tipping etiquette for grooming is and felt so bad that I tipped $10. What do you usually tip?