The white hairs may be grey coming in but I could be wrong. Do you know her parents colors at all? Does she have a face marking? If so do you have a picture? I've noticed that a lot of greys will have a blurry look to face markings. Her tail should have some white in it too if she were graying. Posted via Mobile Device
I know that a horse doesn't have to be THAT white to be considered a roan. I'm assuming that would apply to bays too. I dunno. I've seen a lot of roans and they were all super different with the amount of white.
Maybe to be TRULY considered a roan they have to be that white?