I'm not for sure which pens you are asking about...are they outside or inside?
If they are outside, I have a couple double decked pens in the picture title overview that are solid bottomed for my hun pairs. I used pine shavings in the bottom that allows for them to dust themselves.
If they are insided and title grow out pens, these are wire bottom pens and the droppings fall onto the solid board that is the roof of the layer below it. These are triple decked. I use a shortened garden hoe to rake the dropping off.
Hope I answered your question
