Last year we got 6 Mallards and this year we got 2 Pekins. The Pekins are 5 weeks old and we just got them in the barn last night. I was so worried that my male mallards will hurt them but being Pekins at 5 weeks old they are almost as big as the Mallards. The first night that we tried, one of the males attacked one of the babies. so I kept them in the house again. Last night my husband had a "talk" with the boys and I went to check on them this morning and YES they made it!! Everyone was happy and nesting when I opened the doors. The babies were hiding behind a nest box but were relaxed and comfy! I am so relieved!