I just brought them breakfast. Clucking is starting to happen. Maybe something did scare them.
I just use a tent stake or a heavy bent nail. Tie a string to the stake/nail and also to the wall or fence. Then tie a bright colored bow on it to see it better from a distance (to know if it's "latched" or hanging down on the string). This hardly ever freezes & you don't need a key or combination. I also use spring loaded hook latch - this can freeze.Good idea. I thought about a padlock, but they can freeze up in bad weather.