For older, established stains, use Supreme Products Stain Remover Shampoo directly on to the affected area and work in to the stain allowing to soak in. Further applications may be needed for stubborn stains. With regular use, this shampoo will assist with the removal of yellow stains from white tails. This shampoo does not contain dyes or any form of bleach. It is safe to use on all coat colours and will help breakdown stains and improve brightness and shine