actually u don have to purposely train your rabbit.. u juz confine him in his cage for 2-3 days n let him eat, pee, poo, drink all in e cage.. then u can let him out.. then he should be able to go to his cage to pee n poo while u let him come out n play..this may take some time but after a few times he will make his way to e cage to pee n poo..