I have had a trio of silver appleyards about four months. They are about 8 months old. I recently introduced 3 new hens (Campbell, harlequin, Cayuga) to them. The new hens are 6 months and have just started to lay. The problem is that the SA drake pesters the new hens constantly. Is this mating behavior or aggression towards new flock members? First experience with ducks. Have chickens but have not noticed this behavior in them. Thanks.