It would be a little more cluncky to move unless you drag it, but you could get a hog panel or something similar from your local feed/ranch supply place and just use wire or zip ties to close it into a circle. It's sturdy enough that you wouldn't need any stakes. You can just drag it to a new spot when you want to move them. If you don't want to use th whole length you can also cut them to make them smaller. You'll also probably be able to get one tall enough that the chickens can't jump or fly out.