My German Shepherd is pretty mean and will bite if slightly provoked. You need to put your hand in his mouth and and keep his lower jaw down/open so he can't clamp on your hand. This will also serve tohold his head in place. Now have someone else administer the ear drops.
My 140lb english mastiff has problems with her ears-yeast infection or something nasty. She doesn't like the drops but she doesn't bite me because we established who the dominant one was when she was growing up-yeah bitch, you like that don't you
This dog is pretty smart,he can sense when I'm up to somthing and he will go run under the table and bark at me if I come near him. I don't know whats up with this dog but I never established that I'm the boss with him. My other dog I can make piss just by pointing at him,but this dog does what he wants. Some how he learned early on that big teeth are in charge. I think its a lost cause,I would never attemt to take this dog to the vet. He's one of those "bad" dogs. Probably would have been put down if any normal person owned him. I use my dogs for security purposes though,so I never really minded the fact that he's rabbid.OH well looks like he's gonna have to live with fucked up ears then.