Agree on taking those bars down! My horse's bars were never addressed properly for years before I knew any better to say anything about it, and she is still dealing with the repercussions of overlaid and compact bars.
I highly recommend Pete Ramey' s book Making Natural Hoof Care Work For You. By his own admission it is very over simplistic and somewhat out of date but the basic principles are still sound and he does an excellent job demonstrating the mechanical forces at play in deformed feet. It is very easy to understand by noobs like me,so you would have no trouble with it. One of the things I love most about the book is that he talks about the various general parts of the foot both together and separately. Check it out!
He does offer "updates" in the form of articles on his website, which are all great reads but I miss the pictures.