I just got 2 muscovy ducks (3mos. old) and 2 hens (1 RIR and 1 RIW 11mos.) I have them in the pen together and their doing fine. However, I have 2 khaki campbell ducks( 6mos.) that swim free in my pond but would come to the pen evry few days for some extra food. My campbells went right after the new ducks and hens, so I put them out and am leaving food for them outside the pen. They will have to be together for the winter, any suggestions on getting them to be nice together. I am toally new to all this, so any advice I would find helpful. Thanks and love all the stuff I'm learning from this.