I have 7 hens, 1 rooster, would like to introduce 4 "Daisies" and 1 "Donald" (Peking) to the same pen/coop while free ranging in the daytime. Or do I need to separate them? Also, the ducks are 5 weeks old and almost adult sized. What age or outdoor temps can I put them outside? They are currently in the garage in a dog kennel with a heater. I have a kiddie pool waiting for them.