All of a sudden our bonded pair have taken to nipping each other when it comes to giving them a piece of dried apple or some plantain each. It's like they're so impatient if they cannot get to it because the other one is in the way. The female has always been the dominent one in that she will nip his bum to send him downstairs sometimes but now he answers back when treats are waiting though it never goes further than nipping. Apart from that they are bonded well and never apart for long always, side by side and grooming each other