My chicken shed is a former smokehouse. When I had chickens several years ago I found the mature hens would fly up to the beams where they used to hang the meat. I took that a step further with my new flock, I setup shelf brackets as steps about 2 foot apart using cheap 2X2s that allow the girls to jump from one to the other, then on the beams laid cheap 2x4s on their sides in a grid pattern, as of now all of my 35+ chickens (all except silkies) roost up there all night and their droppings fall onto the sawdust floor so there isnt any special cleanup. They can walk and hop around and adjust to their hearts content. One of my favorite things is going in there before dusk and watching them go to roost in the evening.
Peace,
Dave
Peace,
Dave