The frog needs trimming, the heels need to be brought back to the base of the frog, and also very importantly the bars need to be trimmed. They are very long and laid over, which will lead to flaring and loss of sole growth in the heel area, if not abscesses in the seat of corn.
The hoof wall has been left far longer on the right side of the photo than the left, so the trim is uneven.
I'll have to talk to him about all this. We've constantly had hoof problems with her never growing a heel. But until we put shoes on her they've grown a lot. Not sure why he's leaving the heels soloing though or isn't trimming the frog
The trim is uneven probably because her hoof isn't even itself because she walks crooked. Not like a normal horse does. And he couldn't get a shoe on her the first time because she had no heel so maybe he's growing it out just so he can nail a shoe on? I have no idea but just my uneducated guesses and will have to talk to I'm about this.
If I walked crooked I would still wear a normal shoe, not one that was higher on one side. A trim should still be even regardless of how a horse walks.
The heels will not get longer if the farrier lets them grow like that, they will only collapse more and run forward. If your horse's heels have been low, it is probably because they have been left too long and have run under. Do you see from this photo how the longer these heels get, the "lower" the heel will be?
When heels and bars are left too long, they have 3 options: to break off (rare), to collapse forward, or to stand up tall and push the digital cushion high up off the ground as in this next photo.
How the hoof reacts to overgrowth probably has to do with the angle the horn tubules (the lines that run up and down the hoof) are at when the hoof becomes overgrown. If they are angled too much, the pressure pulls them forward. Otherwise the hoof will grow and jam upward.