Dun Factor

This I believe is a quote from one of the buckskin associations.

"A horse with Dun Factor (Grulla, Dun, Red Dun) always has a dorsal stripe
on his back and can have up to nine different dun factors. These include:

* Zebra Stripes on the front and/or back legs

* A Transverse Stripe over the wither

* Neck Barring (extra stripes or shadowing along the neck)

* Mottling (dark speckles on the forearms and lower hind quarters)

* Tipped Ears (stripes on the ears)

* Lined Ears (black or dark brown along the edge of the ear)

* Frosting over the mane and tail

* A Face Mask on the bridge of the nose

* A Cob Webbing between the eyes."