â Waterless/dry shampoo is good for dogs as long as what youâre using is specifically made for our canine companions. Look your best wherever you go with Waterless Dry Shampoo Foam. Made with micro-fine tapioca starch, this dry shampoo mousse absorbs oil and refreshes hair, leaving no residue and without using water. When my second-day hair starts to get oily, Waterl