have 7 Pekin ducks that are 12 weeks old, and one Mallard duckling that will be 4 weeks old on Saturday. When can I put them together? I have a new duck coop that the ducks will go in this weekend. Monday I'm leaving on vacation so my sister will be watching my ducks. Should I leave the baby separated until I get back in two weeks, or put them all together in the coop? I wont be here to monitor them so I'm not sure what to do. My Pekins were my first hatch, and first time owning poultry, and the Mallards were my second hatch so I'm not sure how to merge different hatches. The Mallards 2 siblings died last week so its been alone ever since. The duckling is doing very well alone, but terrified of me. Would duck interaction be good, or can they possibly kill the baby?