My mare somehow caused herself abit of an injury to her coronary band awhile back and as it has grown down it ended up becoming quite a large horizontal split on her hoof about half way down. I had my farrier coming out in 3 days time but she somehow managed to lose a chunk out of her hoof due to the split she had which is now exposing some of the capsule. We have had really wet weather here lately and I think with all the mud and water getting in this split it has caused the section of her hoof to come away. Anyway I got my farrier out right away thinking she would probably have to be shoed as a friend of mine who has alot of experience with horses believed she would need to be to help prevent the capsule getting punctured. However my farrier didn't believe she needed to be shoed and said that there was a possibility that the capsule could puncture but it shouldn't do, he just told me to apply a hoof toughener. He also said that it broke off the best way by being horizontal rather then vertical and within 3 months it should grow out. I don't know whether to take his word for it about the shoeing or whether I should get a second opinion or go ahead and get her shoed? She is turned out fulltime in a large paddock where there is a creek bed containing rocks and so on that her and the other horses travel through regularly, so I am concerned she will puncture it. What do you guys think?