We had one surgically dehorned this summer, about a week after the surgery we sold him. He was a puppy dog, my 4 year old could lead him and he ate great. About 2 weeks after we sold him he quit eating and got mean, so mean they couldnt get in the pen with him. He started eating again but never got over being mean. They fed him about another month and had him butchered. When they killed him they looked at his brain and found that his brain was dying. Freak deal, never heard of this before, the guy that did the surgery for us has done a ton of calves for us and we've never had a problem. I guess this is the worst case scenario.