Beckie Mabbutt

Maisie is a medium sized cob owned by Lorraine Bryant. I've been shoeing her for about 5 years and for all of that time she has had these strange purple hind feet. She has never been lame with it, I can't get rid of it, and can't really see what's causing it. Quite inconclusive really, it seems to just be the pigment of her feet in the same places on both hinds that causes these stripes down each side.