Yah, don't give up. Keep trying different techniques and tactics. Watch "what works" with the dog in other activities that you may be able to use. I really like bugmom's suggestion. Everybody else gets to go out, have fun outside and the recalitrant one is left alone in the house feeling left out. Ask "Who wants to go for walkies?" If the others are anything like mine, they will get all excited and eager. This should help set the stage. Click on each one's leash, making a big deal about that part. Act excited. "Okay, we are going for walkies." Don't be discouraged if something doesn't work right away. Dog training isn't always easy. What you want to try to do is make the process fun for the dog.