A friend is visiting and building an addition to my coop. We wanted a new section for several reasons- an isolation area for new chicks, to quarantine them while letting them and the old girls see and get used to each other, until they are ready to move in together. It can also serve as a possible future chicken hospital/chicken prison if needed; and it gives more area that can be opened to the existing run, to expand their playground.
The existing run is on a concrete pad, I wanted some real dirt with weeds and grass for them to play in, so the new run will add about 70 s.f. of dirt. First is a layer of 11.5 gauge chain link fence, topped with hardware cloth, so no predators can dig up from underground. The concrete footings go down a foot, the the predators need to first dig under that, and then they'll hit the chain link. Most people bury hardware cloth, but I expect the hardware cloth will rust out in a few years. I expect the chain link should last 15 years or more. Plus, it was on sale, same price as hardware cloth! There will be about 5 or 6 inches of dirt over the chain link.
Landscape timbers were also on sale, less than $2 each, so those will forum the bulk of the construction, including a log cabin coop.
I'll either put together a page or start a thread in the coop construction forum, maybe over the weekend, but in the meantime I've uploaded some progress photos, and the album is linked in my signature below.