Jack-Allen Walker on Instagram: "We’ve all laughed at the classic “dogs chasing the mailman” scene — but behind the humor is a serious issue. When dogs charge at delivery workers, it’s not play. It’s territorial instinct mixed with lack of structure. The dog sees a stranger approaching their space, adrenaline spikes, and without clear guidance, they act on impulse. What might look funny on camera can quickly become dangerous — not only for the mailman, but for the dog. One wrong move, and it cou