curvico_explained on Instagram: "- The video captures a trained Pit Bull mix in a protection exercise, instantly detecting and aggressively responding to a simulated rear attack on its young handler, calming only on command after 10 seconds. - Research in canine olfaction, such as a 2022 PLOS One study, reveals dogs distinguish human stress pheromones like cortisol at concentrations 100 times below human detection thresholds, enabling sub-second threat identification. - Thread replies praise the