I just found out that the run we have for our 5 chickens will be too small when we get 5 more, so I need my dad to build another one. It will be permanent, not a transportable one (we already have one of those). It needs to come off the coop door that we have. Here are my questions: 1. We live right next to a college campus, so I don't think we have many predators that would try to eat the chickens during the day. How much predator-proofing do I really need to have in this run? 2. Is it necessary to line the bottom with chicken wire? Will this prevent them from dust bathing or scratching in the dirt? 3. Do I have to have a ceiling? What should I make it out of? 4. If I don't need a ceiling, how high do the fences need to be? We have RIRs, one Buckeye, and will get Barred Rocks and Wyandottes. 5. I will be including part of the fence that lines our backyard. How do I do this? Do you guys have any pics? 6. What are the advantages/disadvantages of having a high ceiling? (if I have a ceiling) What do you guys think? I would really appreciate ideas and PICTURES, please!!!