i just recently got into keeping chickens, and i purchased a coop from a friend. and it has no roost in it but had a shelf about 16 inches wide, running the width of the coop, around 4 foot high.. also has a ladder giving easy acces(although they can make that jump). my question is, is this good enough for them to roost on.. or do they need actual 2x4's or the right sized sticks.. only problem i see with the shelf is, the poo caint fall thru, so you pretty much have to clean it everyday or they will lay in their own waste..