På engelsk kalder man røde heste med lys man og hale for Flaxen Chestnut.
Fordi det stadig er uvis mht virkemetode, vil jeg ikke gi' mit eget bud, men hellere kopiere en tekst, der er tyv-strålet fra forskere der ved noget om emnet:
"Flaxen
Flaxen is a modifier that affects the mane and tail, causing it to become a white to cream color. Unfortunately exactly how Flaxen works is not know at this time. There is theory that Flaxen is recessive and only affects red pigment. If true, this gene could be passed along for generations on red or black based horses before showing itself physically. Flaxen doesn't always effect the mane and tail equally. It is possible for either the mane or tail to be lightened while the other is not.
Because it is not understood exactly how Flaxen is controlled, it is unknown how many breeds have the gene. The Tennessee Walking Horse, Thoroughbred, American Quarter Horse, American Shetland Pony and Miniature Horse are just a few that are known to have Flaxen. Some breeds are exclusively Flaxen Chestnut, the Haflinger and American Belgian are two."
