You can really see the dish/angle change in that hoof  looking at the front^ 
The way the coronary band has a little curve to it rather than a straight line reflects the collapsing heel

 < this coronary band is relatively straight like it should be 
(dunno that I love the trim but who knows how the horse is bearing weight)


On this front donkey hoof you can see very obvious distortion in the coronary band at the quarters. My totally unscientific observation is that this seems to happen more often with donks and mules than with horses. That might have something to do with their more upright feet, or maybe just more infrequent trimming. 

"It's really quite amazing what a horse will do for you, if he only understands what you want. 
And it it's also quite amazing what a horse will do to you if he doesn't." ~ Bill Dorrance