I will be getting 2 pairs of Mandarins in a few weeks. They'll be about 4 months old then. I plan on putting them in the pen with our 8 ducks. (They are 3 Blue or Black Swedish and 4 months old, 3 Cayugas also 4 months old, and an adult pair of Blue Swedish.) Can anyone advise on the best way to go about this? I already have the pen and its tall and covered. I have to better close up all little gaps in it though. I am looking for a tree (live or dead) to pull in there and stand up in the corner so they'll have a high place to roost. I am concerned about everyone getting along. What should I do? Lisa Please scroll down to my most recent post to see photo of pen.