Bio-Groom Magic Black Dog Color Enhancer 
Magic Black Dog Enhancer is a color enhancing spray-on chalk that will not rub off like ordinary chalks. This product features a special no-clog nozzle. It dries rapidly and stays on. Works great on all long and short hair breeds. It is non-sticky, non-irritating and has a fresh clean fragrance.
FEATURES:
Dries rapidly and stays on
Will not rub-off like ordinary chalk or even come off with water
Will wash out easily with shampoo
Works great on all long and short hair breeds
It is non-sticky, non-irritating and has a fresh clean fragrance