Yes and you'd be surprised at how many do. That's why we have to have tags for our dogs and if we put their cape on there are plastic windows on each side to slide your ID in. In my opinion if you have nothing to hide, why make a big deal out of "legal" mumbo jumbo. Owner trained dogs are not recognized in most parts of Canada and never in Quebec. PSYCH dogs are also not recognized for the simple reason that there are psychyatrists to work with these disabilities. Our dogs do have to pass an access rights test before being qualified. To each his own I guess, but I totally approve of asking for ID. Not any worse than being asked for ID to get in a bar. :)