I have a 3 yr old mustang gelding who has had some issues with forging, or overreaching. I got him as an ungentled yearling. It took about three months for me to have him gentled enough to receive hoof care. By that time, the forging was very noticeable -- I could hear his hooves cracking against each other with almost every stride at the walk.
Once we got his feet a bit more under control, he definitely improved. It is now rare to hear him forging at the walk, but I've noticed that it still happens fairly regularly at the trot (I hear that sharp click maybe every 5-6 strides, more if he's really extending). I'm not sure how concerned I should be. I haven't noticed him actually causing any damage to the backs of his front hooves. Should I slap some bell boots on him while he's working and call it good?
I'm curious if it's more his conformation that makes him prone to forging or if there's something about his hoof care that should be altered? He's unshod and likely to stay that way -- his little mustang hooves are tough. I've attached a conformation type photo of him below. You can sort of see his hooves (click on the photo to view a larger version). This photo is from July though, so not super recent. I'll see if I can get some good close up and current shots of his hooves if there's anyone who would be particularly interested in seeing them.