The All Done hint is the difference between demanding as well as asking permission. My pets can ring a bell to ask to go in and also away from the house and I likewise have one on Bean’s crate. Yet I don’t always open the door when they sound the bell, equally as I don’t always claim yes to them turning up on the couch when they ask. The All Done sign is how I say “demand rejected, yet many thanks for asking.”
It’s a wonderful means to quit asking at the table, also!