Yes, you have to keep his nails super short. It affects the way his feet lay, and the way he gaits.
Put some peanut butter on the fridge, and see if he likes that, LOL. Don't dremel him, just yet. Hold his foot, while he licks it. In a week, set the dremel near him, while he licks it. Then, turn it on, while he licks it. Go slowly, and you'll get there. That's how I had to teach Emma to get her nails done. She had a traumatic nail experience, as a puppy (nail was cut off AT THE FOOT with no pain meds), and she was BAD about it.... I just took it slow, and she's great, now.