I have 6 hens laying (5 growing up). I have 3 nest boxes. 2 of them have wood shavings like on the floor, the third one has straw. I have 1 hen that prefers straw, 4 that prefer the wood shavings and 1 that doesn't care where (or in what) she lays (yesterday's egg was on the floor in the corner by the waterer).