The Perils of Popping

What happens when you click is incredibly important, but what happens after you click and BEFORE you reward is also incredibly important. If I click a dog for a sit, and as I fumble and reach for the treat, he also sniffs the ground, turns his head, and sneezes before I give him the treat. What I actually rewarded is the entire behavior chain. Next time I ask for sit, I may also get a sniff, head turn, and a sneeze.