Ok, I am moving to a new place. I will be inheriting a regular coop, room for 25 birds, up on blocks with an attached, (uncovered) run. (She's leaving me some hens, but I am going to be getting some more chicks next week.) The run, of course, has no grass. It is not covered. The lady said that she has never had a problem with predators until last year, and then she lost about 10 hens to hawks over the course of a few weeks, when they were free-ranging. (About 7 acres.) She's not sure if the same hawk will be back or if it was a migratory hawk problem, since she had not had any issues for the previous 5 years. So, she has really limited the free-ranging and bought netting for the run but not installed it, in case there are troubles. So, that's where it stands and now that I'll be coming into the picture. I do not want my chickens sitting in their coop, I want them to free range. But I don't know anything about chickens! Can I build pens (similar to tractors, but not as permanent homes) out of pvc and chicken wire that they can be in all day and then put them back in the coop at night? I am thinking about two circular pens (22 total birds) that are 10 feet in diameter each (hubby says they are 128sq ft each) with enough door to get them in/out and get water in/out. I will move these pens all over the place. Wind is not a problem. I can fill the PVC with sand or water to weigh it down. I will cover a section with tarp for shade. Does anyone do this? It seems like everyone either has the all-in-one tractor or a coop, not a coop and a portable pen. Do I need to put one nesting box in each pen? I only want them to lay in the coop - but maybe that will be confusing. How do I get the chickens in/out every day? I don't know anything about this!!! I'd appreciate your thoughts.