Be careful not to bathe your dog too often, because overwashing your dog's skin can irritate. Unless there is a medical reason for more frequent baths, overbathing your pet—say weekly or even every two weeks—can dry out the skin and coat. It is generally advised that you should do it once every three months at least, although it's not uncommon to wash your dog up to once a week, provided that you're using a Boon Dog shampoo and you're not overcleaning your dog.
Boon Shampoo for Dogs
To Use: Wet the coat complete with lukewarm water, apply shampoo gently and work back to the tail, lather well into the coats, making sure to avoid eyes and ears, then rinse thoroughly and towel dry. Safe for a puppy.