Help! Tucker has been to the groomer twice before with no problems. This Saturday we dropped him off and she called us a little while later and said he was impossible and she couldn't do a thing! He growled, snapped and tried to bite two people! He NEVER acts aggresively and I trust this groomer, she's done Rusty for 7 years and has a yorkie herself. She is suggesting a sedative but I'm nervous about that. She recommended an "all natural" one but I still don't know. Have any of you had this problem? What can I do? (Besides leave him looking like a little dustmop?)