thanks for all responses, i'll not worry about his toilet habits anymore. now the mounting, pull him away or let the other dogs chastise him. im training him using the positive reinforcement method which to me implies i ignore the behaviour i dont want and reward the behaviour i want to encourage, however with something like mounting, im aware that its not me he's looking to for the reaction, its more of an assertion of dominance and he's likely to do it even if i do ignore it. can anyone help clear up my confusion??