I have 5 hens, 3 are laying now. I have tried everything to get them to lay in the boxes. The all lay on the floor of the coop. I had wood shavings in the boxes , then switched to stray. I got one to lay in the box, then back to the floor. I know they go in the boxes because for 2 dyas now they are kicking out all the straw and laying on the floor. Any Suggestions?