Grooming removes dead hair, leaving only the healthy hair behind, which immediately looks and feels better. It also lets air circulate through the coat better, reducing any odor. It keeps the dog cooler, and looks cleaner. It is also a good idea to bathe your dog regularly with a quality dog shampoo to further improve the benefits of general grooming. Grooming stimulates blood flow, which in turn improves blood supply to the hair follicles and thus improves the health of the overall coat. Grooming also stimulates the lymphatic system, thus having a positive affect on the dogs overall health in the same way that a massage does for humans.