If you are not familiar with a dun or a buckskin, these are known to be types of horses that you can find. A buckskin is known for its yellowish body but its mane is going to be black. The tail and the stockings of this horse will also probably be black. The dun will have a different colored body. Instead of yellow, the color of its body is going to be mouse gray.
The dorsal part of its body is going to be brown or dark gray. The dun will have different colored manes and tails. Unlike the buckskin wherein the color of the mane and tail and will be similar, this time, it is going to be a bit different.