We are new at this, we got all of them last May at Earley Hardware, all thrived and very happy with them. The 6 we have coming we are getting from Meyer Hatchery. Our coop is very similar to yours and is also fenced in. But whenever we can we let them out to do whatever they want, have been lucky so far. In the summer as soon as we're home from work we let them out and they go back on their own at dark and my husband closes them in for the night. Our neighbor traps on the edge of our property so I think that has saved us, he's caught fishers, raccoons, etc. You might want to give Earley's a call to see what they're getting this year, they were super nice and the price was in range with everyone else.....