Color people: what causes feathers to change color?
Dexter is a June 2010 draft cross.
Winter coat, 18 months old
When he shed out all the white feathers, I assumed they were just some sort of young horse coat weirdness. But now that his winter coat is coming in, it looks like the white feathers are coming back.
I've never heard of feathers changing color like this, so what would cause it?
If it helps:
The skin on his legs is black. He doesn't have any true white leg markings.
He has a very faint star but otherwise his head is solid. No white ticking, no white around the eyes.
He has very sparse white ticking in his winter coat. You have to be next to him to see it. Summer coat is pretty solid.
His breeding is a mystery. The draft in him might be Shire. Whatever the cross is, it downsized the draft quite a bit -- last time I sticked him, he was 13.2ish and he string tests to 14.2/15hh.