Join Date: Jul 2008
Location: South of No-where
That has absolutely nothing to do with the paint gene, but is rather a trait of the grey gene. A grey horse of any breed is born a regular color - like black, chestnut, palomino, etc. The grey color then "takes over" the coat by removing the color pigment and thus leaving the grey color. It is very similar to what happens to humans as they age - but it just happens to horses with the grey gene at a young age. The grey gene continues to remove pigments until the horse is white.