Nothing can be harder than trying to groom a scared dog; they may try to bite, nip, scratch, and are constantly in motion. While not all dogs are afraid of being groomed, the number that are might surprise you. The level of fear can range from mild fear all the way up to and including a full-out panic attack. No matter what form your pup's fear happens to manifest itself, you need to be the one to address his anxiety before it has a chance to become an aggression problem.
There are several reasons why your dog might not enjoy being groomed and becomes fidgety and nervous when it's time for his grooming session. He might not have had enough time to get used to the tools you need to use and the noises they make. On the other hand, maybe your pup had a bad experience the last time he was groomed. The hard part is determining why your pup has a problem being groomed.
From your dog's perspective, the tools used (scissors, brushes, combs, and electric clippers) can be pretty scary. They are shiny, noisy, and something he is not used to having in his world. What you may not realize is that this type of fear is quite normal, but with the right training and plenty of patience, you can teach him that this type of behavior is neither necessary or acceptable and get him to the point at which he is comfortable with being groomed by you or a professional groomer. Just remember, it is going to take time, effort, and patience to reach your goal.
It is very important for you to do your best to determine the cause of your pup's anxiety in order to help reduce it to the point at which he will allow you to groom him without becoming anxious. This process can be challenging at times--it will take time to reach the point at which he is relaxed and calm during the grooming process. Relax and have fun. If you make grooming fun, your dog is far more likely to relax and enjoy it himself.