For what it's worth, chickens are now (since a couple of years ago) considered livestock where the owner is civilly liable for damage they cause. So if they get out again and eat your prize rutabagas or something, or injure your pets, you can as a last resort sue for money damages in court.
"If ye love wealth greater than liberty, the tranquility of servitude greater than the animating contest for freedom, go home from us in peace. We seek not your counsel, nor your arms. Crouch down and lick the hand that feeds you; May your chains set lightly upon you, and may posterity forget that ye were our countrymen." -- Samuel Adams