There are many reasons, the groomer is one of the only people in your pets life that looks all over the pet and can notice lumps, grass seeds, ear infections, nail infections, bad skin etc. during a groom . A regular groom keeps your pet feeling and looking comfortable. A matted coat becomes painful and a great place for bacteria and fleas to grow. Nails should be clipped regularly, ears should be cleaned regularly and the skin should be clean and able to breath as it is the biggest organ of the body