I've normally given Chewie his baths at home and trimmed him up myself as much as I could but he's been increasingly more difficult to deal with. I took him to Petsmart (he's still there now) and I get a call from them saying they wont be able to shave him down like I wanted because he's biting at the clippers and she sd he pee'd all over the grooming table...

They're going to attempt to trim his face and other places as much as they can I guess. What can I do to help him get used to being groomed? He can't stay a mess forever.