When taking your dog to the groomers, take a moment and try to see the experience through her eyes. Dogs don't know they're going there to look good. They see beauty from the inside, not the outside. When a dog has a bad experience at the groomers, it is because she went in there fearful, anxious, and against her will.

When those emotions are present for a dog, she will associate everything that happens at the groomers as negative. We want to change that experience for the dog, so that going to the groomers becomes like going to a day spa for a human, where the dog associates the experience with relaxation, massage, and affection. If we can change the context in which a dog goes to the groomers, we can actually make it a joyful experience; an experience that a dog loves.

Changing that context begins with making sure a dog is relaxed before going to the groomers. Take your dog for a long walk before you go, and a shorter walk around the block once you get to the groomers. This will tired him out and make him more relaxed.

Of course, you need to find groomers who understand dog psychology and provide a safe environment and patient environment.
Pay attention to the groomer's techniques. If they're trying to rush a dog through an experience she isn't ready for, that can create tension and anxiety. It's best to wait until the dog is in a calm-submissive state, then reward with a cookie, affection and a massage. That's the ideal time to start grooming.