Shires Ezi-Groom Deep Clean Shampoo. Leave your horse or pony feeling squeaky clean with the Ezi-Groom Deep Clean Shampoo. Perfect for use when your horse is particularly dirty such as a day in the field, to remove products after a show or for a general deep clean. The Deep Clean Shampoo helps to break down and remove dirt, mud, oils and general grime from the hair to leave a beautiful shine. With added citrus, the Ezi-Groom Deep Clean Shampoo is perfect for cleaning feathers on heavy horses.