You have to be VERY careful with dog groomers, check them out thoroughly, as not all are gentle in the way they handle dogs. They could well muzzle him, which may make him even worse, so I would keep trying yourself to clip his nails. Plus if he's not good with new/stranger people, then I personally wouldn't put him through that stress. Have you tried feeding Brody when clipping his nails. What I do with a 'difficult' dog is to have a handful of high value treats in my hand, close my hand ALMOST over the treats so they have to 'dig' for them. Then whilst they are 'digging' for the treats, I can clip the nails as they forget all about the 'horror' of nail clipping. You may only get one or two nails at a time, don't try to do them all in one hit, and it may help to have a second person holding the treats as described above. Keep try with Brody, it does take time and patience, but eventually he'll at least get to tolerate having his nails clipped.