My suggestion if you don't have dogs or pigs or goats or any larger animals around would be like one other poster said is to let them out only in the evening when they can be watched. That's what my mother in law does. If you want them to be able to explore more than that a chicken tractor is great and can be made at home. Lots of plans for them online. If I didn't have my other animals that's what I would do. In my opinion a chicken who can explore is much happier