I have 11 chickens and they've figured out how to escape their chicken tractor. So I built a fence from their coop around the orchard giving them a larger run. The fence is only about 5 feet high, but they flew over it and dug up all my potatoes! How do I keep them from escaping their various enclosures?
You can use bird netting to cover the run/yard spaces. It's relatively inexpensive, but not great for predator proofing.