After you find out if the reindeer are under Agriculture or Fish and Game, contact the appropriate agency to find out what kind of fencing is required by your state. If there are white tail deer in your area, and you are East of the Mississippi River, you will want to have fences high enough to keep them out. White-tail deer can carry a brain worm that is deadly to reindeer, caribou, moose, and llamas. It requires a cycle that involves a certain kind of tree, a snail, and white-tail deer and is in only a few areas of the eastern U.S. If you have any moose, caribou, reindeer, or llamas in your area, you don't need to worry about this. Otherwise, you will want to have fences high enough to keep white tail deer OUT! and don't buy hay from fields that have the infected white-tail deer on them.