Large Animal Veterinary
Ask a Large Animal Vet and Get Answers to Your Questions ASAP
I'm going to guess at this one.
The damage to the hooves (cracking, breaking off) may be secondary to the impact of the head-butting. When the rams brace themselves for the impact, their hooves may dig into the ground. When the tremendous impact occurs, the hooves do not flex a great deal. Instead of bending, the hooves may crack. If the crack is deep enough, the hoof may fall off.