I have 6 hens in a coop. It's a decent size but recently they've tried to run out when I open the door to feed and water. So it'd be great if I could get them out in the yard, but I don't want to build anything permanent around the coop and I don't want to let them out free range (scared that they'll run off, also have a ton of hawks in the area). Any ideas for something like a tractor coop, without the coop or wheels? Just a big cage they can run around in basically. I have some ideas but if there's anything less expensive than what I have in mind, any suggestions would be greatly appreciated!