savannah never was leashed when she went to the bathroom outside before i got her. She had to get used to the idea of being leashed once she came home with me since i live off a very busy road. It took her a while but she eventually got used to doing her buisness on leash. there have been times when she is allowed off leash and does whatever is needed, and doesnt have problems going from off to on...or on to off. Long story short...sorry...i think he will be fine if he is off leash and then going back on once you get back home.