If you keep associating "Outside = Potty", Taggart will begin to self-initiate. He'll start learning to stand around the door area to go outside. Very quickly you'll see signs. He'll walk over, look at you, etc. Reward these little things!!! Over time, the behavior becomes more accurate and more exaggerated (soon, he'll paw the door or sit by it). This process of rewarding small successive behaviors is called shaping. In this case, it's actually closer to "capturing" a behavior. Anywhoo...

I had a lot of inquiries as to how to teach a dog to ring a bell, so I eventually made a video. Disclaimer: I personally like using Post-It notes because, once you teach it once, the dog learns to target anything with a Post-It note. This makes it really easy to teach and generalize various targeting behaviors. You could definitely just teach the dog to target the object itself (the bell, in this case), but I use a lot of targeting so I like Post-It noties

http://smg.photobucket.com/albums/v4...awAnObject.flv