I have four Silkies of various ages ( 1 - 22 weeks, 1 - 16 weeks, 2 - 12 weeks) and they all sleep on the 30" high roost with the other chickens. I built a ramp up one wall to the roost so that everyone would have "equal access" if they wanted it. The Silkies have always just gone right up with the others and never show any desire to sleep on the floor - although they do sleep in a pile on the roost.