I purchased a 15.3 hand grey QH. I know that grey is just a "masking" color and my horse will eventually change color. For the few months I have owned him, I was assuming he would white out in a few years. Now I'm noticing that my horse is starting to have a few flecks of a rosy brown in a few spots. Will my grey horse possibly turn brown? If it helps, he was born a bay!