These are pictures of hooves from 3 different horses. Very strong hooves, never showed any sign of weakness. But the distortion on their coronary bands puzzles me, I do not know what causes it, how to correct it or whether it is a problem at all. It seems to be irrelevant to the shoes, they get this even when barefoot for a long time or shod for a long time. It may appear when they are barefoot and disappear when they are shod or the other way around, appear when they are shod and disappear when they are barefoot. It also seems to be irrelevant to the positioning of the clips. They get it and it goes away in all clipping styles. Unclipped, toe clipped, quarter clipped. Any thoughts ?