Train your chickens to come when called, so you can let them out and get them in anytime you want. Also enables you to call them to safety when predators lurk. If you have multiple flocks, you can train each to come to a different call. Very helpful when you have new pullets free ranging with old flock, and need to get each flock to its own coop.
The great Leigh Matthews, Hawthorn star, coached Collingwood to a flag in 1990, then Brisbane Lions to 3 flags on end 2001, 2002, 2003. (Lost to Port Adelaide in 2004) The man definitely knows AFL football.