I used an 8x6 shed which I got for free and moved to my location (it's really too small to keep 24 chickens, but here in North Texas, they can go outside almost every day of the year.
To it, I attached the "Chunnel", which is a series of horse panels 5' tall x 16' long (2"x4" mesh, very stout wire) supported down the middle by chainlink fence posts and rails. To get an 7.5' wide Chunnel, I made it just barely 6' tall, so I can walk upright. I initially installed 4 panels, then have added to it as I got more money; now it is 10 panels (50') long. Along the bottom, on the outside, I laid 12' 4x4 treated posts, each of which is pegged to the ground with three 16" rebar stakes (one at each end, one in the middle). I attached the panels together with hog rings. If I ever needed to move it, I could probably disassemble the whole thing in 2 hours and move it to a new location. The horse panels should last at least 20 years.
I covered half the chunnel with greenhouse plastic last winter, and placed straw bales so that the north/west wind was blocked. They loved it, and could leave the "hot house" area as wanted or needed. This summer, I have covered the greenhouse plastic with Aluminet, a radiant barrier.
The chunnel is strong enough for a 200lb man to crawl around on! I've seen dogs, coons, possums, and a hawk try to crawl on, reach through, and dig under, to no avail. I am confident that I've done all I could to protect my girls.
Oh, when I move new chicks out of the house, I have a smaller, more weather-protected PVC-framed, 1/4" hardware cloth-covered chicken tractor that is 4' wide x 10' long x 2' tall, which is their home until they're big enough that they can't escape from the 2x4 mesh of the chunnel. The big girls get to know them, and it seemed to make the transition go more smoothly.
My chunnel cost $40 per horse panel and something like $8 for each length of lumber. I cut up one panel to make a door at the end, so I can access the girls from the outside as well as the coop.
If you want more details, email me at
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