a good jr. will do all these things. from what ive seen a jagd would also but can you be sure it will be small enough for underground fox?. patts will also do most of what you want but tend to be hard. and quieter workers. crossbreds are generally an unknown quantity, and its a waiting game to see what you have. if you can be sure of a handy sized jagd then that would be my choice. after a good well bred russell of course