My friend I am afraid to advise you on that situation. It could be fine or maybe not but I am not one to say it will be fine and then something turn out badly. I myself would not do it but my pen is large and I have lots of options I could contain my little ones in. I just know if you have too many in a small pen they can get stressed and then they will pick on each other. Good luck with whatever you decide. No one can tell for sure what a small flock of birds will do in any given situation. They are highly unpredictable.Not sure if I'm able to further separate them, it is still a sort of small setup, maybe 5x5ft in the main area and a 2ft x 8ft walkway from the nest boxes to the main area. They do have places they can hide from each other, but ultimately they could probably be cornered, for example the ducklings could hide in the other nest box but obviously the girls could get in. I know it's not ideal but if you think it'll work for 2 weeks I'll put them in there.