Grooming horror story!

Awww. Poor dog. I hope he's healed up alright. My mom and I took our mini aussies to petsmart to have them shaved, once, and they came out fine. The only thing that bugged me were the stands with the ropes. Dogs can easily hang themselves with those things. All they have to do is step off the edge when the groomer is not looking or get freaked out and try to run off. Perhaps your dog spooked and turned his head when the groomer went to groom his ears. Some dogs can be jumpy, especially if there's a stranger holding something noisy and/or sharp near them. Next time, pleas stay and watch the groomer. You will not only see how the groomer does their job, but you will also make your dog feel more secure. That's what my mom and I did, especially since the littlest aussie was skittish and the larger aussie was getting shaved for the first time.