Nope, that's not right. Bob's got 'em all around. The breakover is just as important on the front as on the back. They may not be as prone to navicular changes on the back as on the front, but I think that's because most farriers aren't as prone to leave the toe as long on the back as the front.
What do you think about trimming the frog??? I really believe it's done just for looks????
He really should have left the frog as long as possible. When it's done correctly, the frog should be touching the ground, even with the shoe on. The frog pressure is what supports the heels and keeps them from getting contracted, so he's kinda defeated part of the purpose there. I also don't like the way he's left the right hand branch of the shoe hanging out of the crease of the frog. He should have hammered it closer in, like the left side. The point of that is to provide more support and to hold the dirt in there in order to keep the sole of the foot hydrated as well as to provide some support to the frog in itself. He did get the breakover back closer to where it should be, but like Bob, it's not back to where it SHOULD be yet. Maybe in a couple more shoeings it'll get moved back. I'm going to be keeping an eye on Bob's next shoeing to see if it moves back some more on him. I'll take more pictures and let you know. This is the picture of Bob's right front, about a week after the NB shoes were applied. See the difference in the frog between Bob on the left and Harley on the right...
My guy left the left branch of the shoe a little bit farther out, which really isn't good either. He also rasped the toe overhang off, which he really shouldn't do, but like you said, he did it before I had a chance to stop him. Here's a pic of Bob's right hind. It's set closer to being how I think a NB shoe should be, although the breakover is still too far forward...
This is how it SHOULD LOOK. See how close the inner rim of the shoe is to the point of the frog and how the heels of the shoe are set equally over the creases of the frog...
But over all, he's better off than he was before. It may take a few shoeings for everything to get just right. You can see how he does with them on just the front, but I think I'd ask for them on the back the next time, just to see. It certainly won't hurt anything.