Converting a workshop into a coop- I've heard mixed ideas on round fowls/branches versus a flat 2x4. I'm also wondering about placement. How far do they need to be from a wall? How high? Is it really important to be able to remove them for cleaning? How do you make them easy to remove but not wobbly under the birds? Also, the structure I'm converting already has built in shelving and a 4' counter. I've heard chicken will go for the highest available spot. Is this true? Are they likely to roost on the counter/regardless of what I put in? I'd certainly rather have then use roosts that I can slide trays under for easy clean up, but I'm not sure how to explain this to the chickens.