A little bit of Bio-Groom Magic Black Coat Darkening Spray is all you need to intensify the color of your companion’s coat! This spray-on chalk has a true black tone that darkens fur and covers up stains. Great for pets with short or long hair, the quick-drying formula won’t rub or wash off with water, unlike other chalk options. For a dazzlingly dark furchild, make this Bio-Groom spray is your go-to styling product.