Grey

Grey is an ongoing process of depigmentation of the colored hairs. It is sometimes referred to as a pattern, which is incorrect. Grey is a modifier, which would be more accurate. Grey slowly removes the pigment from the base color, other modifiers (such as Mealy & Sooty) and dilution genes (such as Cream & Dun) that make up the original color of the horse. Grey has the unique ability to mask everything including any Pinto or Appaloosa patterns. No color is safe when Grey is present, as all horses that carry the Greying gene will end up a shade of grey or white. For this reason some breeders do not like to have mares or stallions in their breeding herd.