My 6 little RIRs will be 2 weeks this Friday, and already seem to want to roost. When I take the top off the box to clean and feed they all fly up to the edge to roost (it's about 12" high!). Is it too soon to put a little roost in the box for them? And if so, what would be best to use at this age? I'm hoping this will help keep them off their food dish-- I've tried elevating it and it's not working!