My quarter horse gelding (in my avatar) is sorrel with a stripe and two high hind socks, and he has white hairs scattered around his body in various places. I wouldn't call him a roan though. You don't notice them until you get up close.
I was told the white hairs are common with the Zippo Pine Bars (he traces back to Zippo).
Interested to read the comments you're getting. It might shed some light on mine as well.
No a horse does not "roan out" unless it has varnish which is an appaloosa trait. Most horses and more so red horses will have whit ticking that can come and go and even be heavy ticking at times. It is not roan.
^^Agreed, most chestnut/sorrel horses will have some level of white ticking throughout their coat. That's just part of having a sorrel. I'm unsure what gene it is that causes it (or if that particular gene has even been identified yet) but it happens and it is not related to the true roan gene. Also, I don't believe that pinto genes can cause patterns to "show up" later on in the horse's life. They either have the paint parts when they are born or they don't.
Anyway, here is a good example of what white ticking can do on a sorrel horse.
This is her head a little over 4 years ago when we got her
And this is her head now (she was 7 then, she's 11 now)
My current solid sorrel TWH stayed a solid sorrel until he was around 15. He is now 19 and has "roaned out" to about 30% of white hairs. I was not happy but that's what happens when your lineage goes back to a horse named "Roan Allen".
Conversely I had a solid sorrel Arab/Saddlebred that I raised from birth until the cancer got him at age 29. Even with the cancer, his coat remained solid sorrel to the end.
Walk the Wind I would bet money that your horse has Sabino ticking. No 'classic roan' will start to roan out at 15.
OP your horse also appears to be sabino based on the shape of his socks (how they come to a point) and also the white on his lower lip. Both are classic indications of sabino. Neither parent is a classic roan so ther is no possible way for your colt to be. It does not skip generations.
The difference between Sabino and Rabicano is just that they are different pinto genes, just as tobiano and overo are different genes.
Since he's already developing a decent amount of ticking this young, there is a chance that he could continue to get more...but it will likely never really be enough to qualify as a part of his pattern.
I forgot to get pictures today.. Sigh.. But it seems like he had a little more then yesterday. Maybe its my imagination... I didnt know that could happen so fast! I am kind if excited to see how it turns out to look... Although it seems as if most people with sorrels don't appreciate this gene? Lol Posted via Mobile Device