I currently have 3 Rouen females that are just under a year old. In two days I am getting 3 more Rouens that are 6 weeks old, 2 females and a male I believe. Here the days are in the low 80's and the nights have been dipping into the 60's. They are inside their "Bunker" at night and left out in the morning. Should I keep them apart because of their age for a period of time? If so how long? Or should I just put them together Saturday morning and observe how they act together? The "Bunker" is 4 ft wide by 8ft long so your talking 5 1/3 square feet per duck when they are in overnight. Their yard is 50 feet by 100 feet that they range in during the day so if there is going to be an issue I would expect it to be inside overnight. They also have a small pool in the yard to play in though usually only ever see one at a time in there.