Here is some background, we started with twelve straight run ducklings, culled all but one of the boys and lost a few females to unforeseen issues. We only ended up with three ducks and one drake. The breeds are one harlequin duck, one hookbill duck, one appleyard duck, and one appleyard drake. Those four were doing great for about a year, laying eggs, and getting along. Just being ducks. This spring we decided to hatch some eggs so we got an incubator. We set seven eggs and six hatched. We raised them in a separate pen from the adults, although the adults did have access to come visit them whenever they wanted (fence between them). From those six we ended up with four more boys and we culled all of them. The two remaining ducks are appleyard/harlequin crosses. We put those girls in with the other four ducks which wasn't too bad. We kept them all locked up in their yard together for a few days and overall they put up with each other. The older ducks started to molt just as we put them together. I think was right on schedule anyway but I figured I would mention it. The problem is it has been two or three months and they still haven't 100% integrated. The older ducks still tend to nip and pick at the younger ones and try to avoid them when possible. The younger ducks try to stick to the older ones like glue which seems to frustrate the older ones even more. The hookbill is always loudly honking about something, it seems to be she want to move to a different place in the yard. It's not terrible or anything, it's just that before they were quite serene and now it feels like constant quacking and tension. Also the older ducks have not started laying again. I don't know how long it usually takes but they are just about fully feathered at this point so hopefully this is just a normal molt and doesn't have anything to do with integration problems. Anyway, maybe I am being overly sensitive to the situation because I want them to be happy/comfortable and they don't seem quite right. Maybe I am being overly concerned because I am in a (rural) neighborhood and don't want the people around to get annoyed. Would appreciate any advise or experience anyone has on this topic. I think the older four have a pretty tight bond and are reluctant to let the new girls in, but that's not going to work over time as I plan on continuing to add and subtract birds as necessary. Anyone have any ideas?