Hi! It’s my first time owning a Sheltie and I’m trying to figure out his behaviors. A few months ago we taught him how to go up the stairs and down. We only have four stairs he goes up and down. He can go down just fine, and is perfectly potty trained, sits on command, shakes on command, drops items when told to do so! He refuses to go up the stairs anymore. When he doesn’t go up, we pick him up and carry him. He’s a very lazy, laid back, and soft tempered Sheltie with a little bit of spunk. He only goes up the stairs when there’s a high reward or if he hears someone outside and is running out of fear/escape. If we leave him at the bottom, he just sits and whines or barks. What should I do?