Ok so this is probably a stupid question but I'll ask anyway. I just purchased a percheron TB cross mare who is 5 yrs old. I don't know what her dam/sire looked like as she is a PMU horse. She is black, however I'm noticing a few white hairs mixed in there. They are the most concentrated around her flank and there is a few white strands in her tail as well. I have mostly arabs and have seen them grey out, but not from a solid black and they usually started before age 5. Sorry about the pic but hopefully you get the idea.. What do you think? Is this the beginning of her greying out?