depends on the dog lol Happy almost never wears a collar but I can also garentee that she will never bolt she hnds out candy with me on halloween lol she walks out the front door all the time and I can leave her out front go do something and come back she wont go anywhere lol Misty where a collar MOST of the time, she like Happy wont take off anywhere however I dont trust her as much as Happy, Happy I can leave outside anywhere and she will stay, I leave her in peoples front yards all the time while I go in to visit lol she just wanders around the yard but never leaves it. Misty I always tie up for something like that lol but she does get into trouble a lot so I need to be able to grab her collar. currently she is only wearing a bandana. Perky always wheres her collar she does not go anywhere as long as my mom is home but she has wandered off just to find my mom before(ok so she slowly mosied over to the naighbores house lol) Blair always wheres his collar not that you can tell.. lol he WILL take off if given the chance because running towards moving cars is just the kind of idiot he is lol Ripley also always wears his because he likes to take off and meet people, he litterally finds new people to meet when he has his collar on people can just let us know they have him, when he is not wearing his tagged collar for whatever reason and he gets out people find us from is tatoo lol