is is able to catch them and actually hurt them? They are still a bit young and I would give more time but what happens when they are all together? Does he just nip and chase them off or is he hell bent on killing them?needlessjunk, Thanks for the reply. The only size difference is that the ducklings are already twice his size. They are welsh harlequins and Ollie is a mallard. Is it possible he will NEVER come around?