As long as they are in a high fence, it isn't really a natural resource. Thats why none of the "books" recognize them. That being said, I would NEVER be proud of a high fence kill. JMO, but they are technically livestock. That's one way I think MN has an edge on states like Texas (not to pick on anybody by any means, its just a place I have been), we may not have as many big bucks, but our captive deer are considered livesock.