I'm new to the entire world of chickens (and forums), so please bear with me. I'd like to apolgize in advance if these questions are re-runs, but there was so much material to search through, I was unable to find specific answers to my questions! My husband and I are building a chicken tractor similar in design to the Forsham Cottage ark / Boughton design. It is a basic A frame design with the coop portion on top and a small run underneath. Here are my questions: 1. How wide should the ramp be that allows the chickens access from the bottom run to the top portion? I'm thinking about 8". Will that be enough? 2. How big should the opening be for the nest box? Again, I'm thinking about 8" x 8". Can chickens "squeeze" into tight spaces? 3. Should the nest box be totally enclosed with a small opening, or is a separate area with a large opening sufficient? Looking at the Forsham/Boughton pix, it is very difficult to see what's going on in there! 4. Keeping in mind that the ladies will be living in an "attic" space, how high should the roost be off the floor? It is kind of a tight space with a total of 19" at the max. It gets lower toward the sides due to the A frame shape. I do have plenty of length, however, at least 10" per bird. Would 5" above the floor be adequate? Thanks so much for any information you can provide! I look forward to hearing from anyone!