You probably introduced it to him incorrectly. Try playing with him in the bathtub while it's dry. Comfort your dog and play with her inside of it. He will soon like the bathtub. Next, put an inch of water into the tub. Get into a swimsuit and start playing exactly like how you were before except with a little bit of water. Do this for two weeks and then try bathing your dog again.
Take extra care with dark-nailed dogs not to clip to the quick (blood vessel). Go slowly, and only take a little bit off at a time. Dremeling is much safer and easier to avoid hitting the quick, as it shaves only a little bit at a time. Use a cordless pet-safe Dremel tool, as the corded ones will not stop turning if they catch hair. Don't dremel for too long as it will burn the nail and prolong the trimming process for the dog which causes more stress. The best recommended process is trim first then dremel to shorten a little bit and round out the nail do it's not sharp.
Pets with special needs: Our salon safety protocol is maintained to the highest safety standards. Express service is available for pets who prefer to be hand dried only. For pets with flatter faces (also known as brachycephalic), your stylist will recommend this option as this will greatly decrease the amount of time your pet will spend in the grooming salon, and may be a better option for the health of certain breeds. Please note that we cannot accept wolf hybrids at this time, due to vaccination limitations.