Yearling Buck with hunch back

Early November I went to check on my deer and I found my one yearling buck laying down and had drool coming out of his mouth. (This buck was not bottle fed, and will run away from me). Well I go in there to check him out. He tried to stand and run away but he couldnt get to far and would fall down. He was acting like a intoxicated person. His head was down and eyes were barely open.I called my friend over and we pick him up and moved him into the shelter. The night before was very windy. So I assume he ran into something. Or got his base of his antler caught in the fence and tried pulling it out.I gave him some draxxin that night. The next morning I check on him before work and he was up standing but was swaying left to right. When I got home from work he was walking and was more alert but still didnt look right. He improved a little more every day. I gave him another shot of draxxin a few days later. Well now its February and he is still alive but looks a little skinny. He also has a hunch back. Any help would be appreciated. Thank you