I'm sorry to hear about what happened.
You guys need some visible sign that the chickens have been locked up. Like a "Do not disturb" doorknob sign on your front door that you can put up after you lock the chickens up, so you can see it and know the chickens are fine . . . or see it isn't up and go lock them up.
That sort of thing happens, especially when the routine hasn't been ingrained for YEARS! I'm just sorry you had to pay the price.
You guys need some visible sign that the chickens have been locked up. Like a "Do not disturb" doorknob sign on your front door that you can put up after you lock the chickens up, so you can see it and know the chickens are fine . . . or see it isn't up and go lock them up.
That sort of thing happens, especially when the routine hasn't been ingrained for YEARS! I'm just sorry you had to pay the price.