The oils on your dog's skin and coat give your dog its distinct odor. They also serve to protect your dog against environmental toxins and are important for healthy skin and coat. Dirt and pollution accumulate naturally on a daily basis and need to be removed from the skin and scalp so the follicle remains clear, balanced, breathing and growing.
Waterless dog shampoo is intended to absorb excess oils - making the coat appear less oily and "clean". 
In fact, waterless dog shampoo retains the environmental toxins on your dog's skin and coat where they can then lick it off and ingest it! 
Want to see what they may be ingesting? Take a look...