In my coop if have a Ramp to get to the roosting area, i made a second level where the roosting bar is (2x4) that will hold sweet PDZ and sand mixture, allowing easy clean up. My question is will they use the ramp to get up or just try to fly up? I have a wood border around the upper level to hold in the PDZ and sand. I will put wood on the ramp so they can walk up easier, how thick should that would be and how far should i space them, to make it easy for them to get up? Thanks, Jackshomestead!