Dogs don't need bathing as often as people. Too-frequent baths with the wrong product can strip natural oils and dry the skin. How often depends on the coat, lifestyle and skin health: a muddy Labrador will need more baths than a house-bound Chihuahua.
Use a shampoo made for dogs. The ASPCA notes human shampoos aren't toxic, but some contain fragrances and ingredients that can irritate a dog's skin.
Many dogs are nervous of baths, so take it slowly, keep it positive, and use plenty of treats.
