She is really beautiful, I love the blue eye!
But I think it might just be sun bleaching. In the pictures she looks to be a very true black, It could also be only with her winter coat?
But I don't think she looks like a brown to me.
Not true. Chestnuts, bays, browns, palominos, buckskins, duns, etc all have black skin.
She can't "turn" brown persay, if she's brown she has been from birth and always will be. They tend to change during different seasons though. She's either brown or a sun faded black from the sounds of it. Pictures will help. Posted via Mobile Device