Many dog shampoos or washes are loaded with chemicals that can irritate their skin and cause even more problems. One way to avoid chemical shampoo cocktails is to make your own all-natural mix using Castile soap, baking soda and apple cider vinegar. In between washes, generously sprinkle baking soda all over your dog's dry fur, and massage it in. Brush through the hair to get out the baking soda. The alkalizing nature of baking soda won't irritate dogs' skin, and it will naturally keep their fur deodorized and smelling fresh.