Originally Posted by lilruffian
Not true. Many horses have countershading, which gives the impression of a dorsal.
True duns have to display more than just the dorsal, be it shoulder barring or zebra stripes on the legs. Also, to be a dun one of the parents has to have been a dun for the gene to be passed on. It is not something that just "crops up".
That mare appears to be a sorrel in these pictures, as the others have mentioned.
Sorry guess I should have been more clear with my reply.
The question she asked was if a horse has a dorsal is it a dun?
I said yes, only horses I know with a dorsal are duns and can vary from a red to golden color.
I have owned 3 dun paints and all of them have dorsals and zebra markings on the legs.
Look at the pictures I have posted and you will see my duns.
Of course the picture she had of her horse with a saddle on looks like a sorrel to me also, and if I had to guess at the breed of that horse I would say Arab X QH............