My husband has made me a duck house, 4' x5'. I have 8 ducklings, 4 buff orpington, 2 Indian runners and 2 mixed. Will this be enough room for all of them? I only plan on closing them up at night and if the weather becomes too frigid come winter. What do you guys think? I can pass on the mixed and return them to my friend if it will be too crowded once they are full grown.