Same here. On the few times I brought my dog down to the garage, she stayed in the vehicle.
You guys are lucky getting a high energy pup to focus on a treat. Being green to raising a pup, I learned real fast that once outside on a walk there were higher priorities. Occassionally she would take a treat - such a as hot dogs - then spit it out just to make that point clear! Took a couple months of training in less distracting environments before food type rewards were useful any distance from the house and yard. Blame it on the chow. LOL