silkies in general do not like to roost... I have raised floor (bout fifteen inches high or so) and I use the low-sided cardboard boxes that apples and oranges come in filled with shavings for them to sleep in (I offered them several choices and this is what they chose!) ... (I recently built a summer coop for them and you can see pics in the thread How do you build a coop for the poor and unhandy) ...since they only use the coop to sleep in and I have only silkies , a "normal" coop with so much space needed for roosts and such isnt necessary and having a small coop keeps the warmth in during the winter!