Also see the "How To" on the basic "Wait" command which is a good precursor to the gate boundary. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-F1BwLiUW8to.html
great video! I need to start training my Chihuahua because she's going to stay with my cousin at my parents hostel and there's people always coming in and out and some leave the gate open, she usually will just roam around and get in ir wait till someone opens if she gets locked out, but I'm scared that she may leave or something