I've got 5 pens raised, and attached to a shed. They are each the same size, and I have 1 trio in 2 pens and 2 trios in the other 3. Are my nest boxes adequate? Do they need to be seperated by cardboard so they can't see the others? I've not got any eggs and I've seen them bredding for a few days now, please, any input would be greatly appreciated.