I guess they are afraid of CWD. I think that when CWD became known in domestic herds, all deer movement should have been stopped between farms. Kind of late now for PA. A farm free of CWD, is not likely to get CWD, in the future, if no new blood is brought in. We now have free roaming wild deer in PA spreading prions everyday. I consider the free ranging wild deer to be of the greatest concern. So closing all deer farms in PA will not eliminate CWD, it may slow the spread. A ban a few years back would have helped.