I've got a flock of four in a small coop in an urban setting. The yard is only half fenced, but they're smart well-behaved birds and know exactly where their boundaries are. They've never even tried to wander off. I'm the alpha of this squad, so I can pretty much say "girls, coop up" and they come running. My roommate shakes a bag of mealworms, and they come running for that too. To the point: You've heard about people using clickers to train dogs? I just bought a dog clicker to try to train the hens to coop up immediately. This is for two reasons: (1) when we travel occasionally, we'll have someone chicken-sit, and I'm worried the birds will get out and not listen to a stranger and (2) four red-tailed hawks nest near the coop, and they've already taken a few swoops at the hens. I'm going to try this out because I need a "get the f-k back in the coop RIGHT NOW" solution. The plan is to hang the clicker on the side of the coop so that it's always there. We'd practice with it so they can associate the click with a handful of mealworms, sort of like shaking the bag works. Questions: Has anyone trained their flock with a clicker like this? And if not, do you think it will work?