I bathe Sonny once in a while with regular dog and cat dandruff shampoo. He sits through it with grumbles but comes out softer than ever. My big problem is not with dandruff but that he gets all greasy, and sometimes sticky, along his back where the kids always pet him, two four year olds and a ten year old with dirty sticky hands. The brushing at the end is like heaven for him and makes up for the lost dignity of getting a bath in front of the dogs.