I am building a new, 16 X 16 duck pen for the ducks, but I am worried that they will mess it up fast! I will have 12 ducks. All the hens will go in one space, and the drake in another so hens dont have stres.on them at night when its bedtime. I think I will have 4 drakes, and 8 hens. Is 16 X 16 big enough for 8 hens over night? And is 7 X 8 big enough for 4 maybe 5 drakes over night? They all free range.during the day, but at night get locked up tight. Tell me if I need to make the pens bigger.... Thanks!