People often assume that their dog will enjoy being brushed as much as they enjoy brushing them. That is not necessarily the case. Some dogs find grooming uncomfortable. They may be sensitive to certain brush types or to being brushed in certain areas. Any change in your dog’s reaction to brushing a certain area may be a clue of a health problem or injury.
If your dog just doesn’t much enjoy grooming, you can help him or her get more comfortable through gradual desensitization. Get treats and your brush. As you start to brush your dog, give a few treats or enlist someone else to help you by giving the treats. Don’t try to do a full grooming session. Instead, try just a few brushes. If he seems ok, you can give more treats and continue. If he seems very uncomfortable, allow him to move away.