Our puppy came paper trained. I have been sick with the stomach flu this week, so it worked out OK, but now that I'm on the mend I'd like him to do his duty outside. How do I encourage him to poop outside? I've tried putting paper out on the lawn, that didn't do anything. I can tell he has to poop because he is making super stinky farts, and that's what he does right before he poops. I have never had a problem housetraining a dog before. Help!