Chestnut or something else?

Yeah he is chestnut, my bay has some white hairs too. That white mark does look like an old saddle sore to me.

He's chestnut or sorrel

Sorrel & chestnut are the exact same thing genetically.

That's for sure not rabicano - it manifests itself much differently. He has what is called "sabino ticking". Sabino is a gene that causes anything from a little star, to an almost all white horse. Basically, "sabino" is what is used to describe genes that are responsible for markings that haven't been identified yet (save for SB1), and certain ones can cause the ticking, like your horse has.

Oh, btw.. he's a regular chestnut/sorrel.. not doubt there.

My mare has ticking, just like your guy.. and she's black. I tell ya' though, I've always found it to be a heck of a lot more attractive on the red horses than it is on the black. Ha.

My mare is sabino, with rabicano roaning, which although he doesn't "look" sabino, he definitely may have some of the roaning factors...your horse IS chestnut, as well...or sorrel. Those are the same color, just different folks called a 'red based' horse a different color in different regions of the country, that's all.

Hm see, I was always led to believe SORREL was the lighter red color, and chestnut was darker. I always thought there was a difference, and recognized chestnut and sorrel as two different colors.

Sorrel:



Chestnut:



And then there are liver chestnuts, etc... I'd just call them "red horses" honestly.

Edit: read this: http://greenfield.fortunecity.com/dreams/799/hc/red.htm

Snookeys they are genetically the same colour :)

In Australia we don't use the term 'sorrel' much at all.

There is a name for a chestnut horse that has a lot of white hairs, but I can never remember what that color is called !

As it has been said, genetically they are the same, just two different shades of "red."

Sorrel is a western horse term, mainly used by QH and Paint Horse people. You won't find it used in the "English" breed world, Arabians, TBs, Warmbloods, etc.

Good article:
Horses - horses and ponies on the internet

If you ask me he is most certainly a chestnut but he may have a small roan element in him if you insist that there are plenty of white or grey hairs on him.