Attempts are made to mate the middle-aged matriarch of Knowsley's group of six South African white rhino with a young bull. Their behaviour should offer clues to the keepers as to whether Meru is still fertile. Staff spot that Bobby the baby baboon can only fully open one of his eyes, and they wonder if he's partially blind. Elsewhere, M the ostrich has lost a toenail and faces an amputation to stop the subsequent infection from spreading