So I am getting 3 blue fawn calls, 2 hens 1 drake. However, I am not sure how much space they need for a run??? We have rouens/pekins that free range all day but calls are just so much tiner that I would rather build a run that attaches to a coop for them and that I can move to new pacthes of grass during the summer. Now I found a great rabbit run that connects to a hutch, but I wouldn't use that hutch. Its 40" length and 33" high. It looks big but I don't know if its big enough. Thanks!