I kept mine in a pen but I've read they will forage and supposedly it helps keep them healthy. I don't have much to forage on and a lot of predators so I kept mine penned. I ordered mine from Murray McMurray and was very happy with them. The local feed store here carries them too but I was so happy with MM that I ordered from them again.
I made the MM mistake once...never, I say NEVER AGAIN!!!!!!!