My boys know they have their collars on before they go out. I beep them on their loc8tors and they respond and come in for food. Occasionally they have come off (quick release) and I have to go on the hunt. Today my boy came trotting down the garden with his collar in his mouth, at one point he dropped it and picked it up again. I watched him, he came all the way into the house and dropped it at my feet with a miaow. Let me put it back on and went back out.