In many species, colorpoint patterns come from a genetic mechanism causing pigment to be produced only in cooler areas of the body, called acromelanism.
[6] Sheep breeds with black points include: Clun Forest, Dorset Down, Hampshire Down, Norfolk Horn, Oxford Down, Shropshire, Suffolk, and Valais Blacknose.
In cattle, extreme color-sidedness creates a colorpoint pattern with a white body and darker ears, nose, and feet.
[8][9] In donkeys, the term "points" refers to the muzzle, rings around the eyes, belly, and upper inner legs, which are usually light in color.
Dark points are caused by a recessive allele of agouti found in Normand and Miniature donkeys.