I killed a nice young bull in blow down a few years ago that jumped in a little gully and died. It had it's very small left antler detouring from normal direction to a single point terminating right at his left eye. Paunched and quartered it and ran it to my buddy's place on the quad. When I skinned out the quarters we found a rather large knob of bone, right up against a rib on the outside between the skin and the rib on the left front quarter. Thought maybe a tumor at first as it was visible from the hair side. It probably weighed 1/2 lb. I cut the rib out and smashed the knob of calcified tissue/bone with the back of my axe, only to find a 22 rimfire slug barely deformed in the center. I mentioned it to a wildlife biologist buddy who figured there was a relationship with the slug and the strange antler formation, suggesting the healing of the rib stole the calcium from the left side(same side) antler growth. Who would have thunk it?