This is my mini - just like yours! Roaning on the forhead and a white spot on the withers - also never worn tack besides a halter.
She's a new rescue and looks Terrible!! But she's so freaking cute under her rag-a-muffin coat. This is my sad little girl (she's slowly gaining weight and loosing coat with medicine for her Cushings):
Her roan forhead:
Her white wither spot:
She's 9 years old and lived on kind of a miniature farm (With mini sheep and goats and cows) never really handled. So definitely not tack rubs or anything.
Okay, this is interesting, I have a mini with the same thing going on! Except she's a Flaxen Chestnut, but her body is almost very lightly roaned or ticked with white and her forehead has a denser collection of these white hairs that seem to gain more substance as she gets older, she's only about 7 or 8 right now.
I was told before she just had random ticking.
I hate to jack this thread but I just wanted to share since it seems seeing multiple example could help come to a conclusion?