I'm hearing all this wonderful stuff about how easy clicker training makes training a yorkie puppy and Ive got a couple questions about it I was hoping someone could answer for me. For one..can you use it for housebreaking a new puppy. And two..is the clicker used just to learn commands or always to reinforce them with a treat? Like..after the puppy learns "sit"..will I always have to click and treat? Thirdly..can I do this myself..or do I have to take my puppy to an obedience class? Thanks so much for your help guys!