I have 2 drake muscovies and 2 females that are 15 weeks old and 2 females that are 5 weeks old. How should I intoduce them? They have seen eachother through a fence almost everyday for the past 3 weeks but the older ones still try to bite them. The duckling aren't scared and get upset that they cant follow the big ones when they walk away. Do I have to wait until they are fully feathered and not peeping? I did not expect them to accept them several weeks ago, just trying to ease the introduction but everytime they see them, its like they have never seen them before. Just thought I would have seen some progress by now. Im new to ducks and worried the older ones will never accept the new ones.