Thanks Trev, I guess a polytunnel frame would be similar to those metal run frames. I had wondered about using an old aluminium greenhouse frame in a similar way but that might not be as sturdy.
I'll look at those links, thanks

Thanks for replying Mo. As I understand it the avian flu regulations have been relaxed at the moment but I would probably keep it partially if not fully covered anyway to keep out rain. Do you think if I left wider mesh on the upper part it could let small birds in? I hadn't thought of that. I imagi...

I am getting some rescue chickens after a break of no chickens for a few years and having moved, so I need a new run. I've bought a second hand eglu house without run, but I would like a larger walk in run but trying to keep costs down. I've seen lots of metal framed runs on eBay and also second han...