Our dogs wear collars only while going somewhere. Sometimes after a bath they all wear their handsome/pretty collars, but that's about it. It's a big risk. They are all microchipped. I had an incident with my old husky mix once...I was at a carnival/town get together thing (with food, boothes, live music) and someone had let a young child hold there overexcited German Shepherd..he got loose and rushed over to pick a fight with my guy, and somehow in the scuffle his collar actually clicked into my dogs leash-the clip was not the kind you pull down, its the kind that pushed in, and they were stuck together until the owners were able to come over and help (I sure didn't want to reach down and all over a strange GSD). Everyone was ok but it was kind of scary.