The dun is a dilution of the coat colour characterised by a lightening of the coat, with the head, lower legs, mane and tail not being diluted. Often the dun is also characterised by primitive markings such as a dark dorsal stripe. The dun dilutes a chestnut coat into a chestnut dun, a bay coat into a bay dun, and a black coat into a steel gray.

Transmission

Autosomal dominant

Breed

Arabian , Fjord, Highland pony, Mustang, Poitevin , Quarter Horse