Originally Posted by HooverH
I've often wondered if whites or greys dirty themselves more to protect their skin from the sun...but they certainly seem to do it a lot more than darker colors!
Probably not, since their skin is black. Like all horses, the only pink skin they have is where they'd have white markings if they weren't all-over grey.
Greying is caused by a gene; it's not really a coat color, although we refer to it as such.
The only places Casper and Cloud sunburn are where they have pink skin, just like any other horse.