We've had some really hot weather lately so most of our exercise has been mental. I'd like to teach Ringo (16 week old heeler/pit) to back up. I've watched some videos online and I've been trying to teach this via shaping but he has such a good default sit that he just sits in front of me. Should I ask him to stand (which he knows) and then toss a treat between his front legs and click when he backs up to get it? Or just wait for him to do something? We've been working on sit-stay a lot so most times if I wait he will just continue to sit there...or offer a down or just get bored. Should I get him excited with a toy and try to capture him taking a step back if I can, or would that be too confusing? Any tips would be appreciated!