How good is a dogs sense of smell?
In dogs, the nose may indeed be their most highly refined sensory organ. It’s definitely more capable than that of most mammals: it can detect substances in extremely small concentrations, such as human sweat diluted a million times. Specially trained dogs can even pinpoint the smell of specific narcotics amidst a complex mixture of scents. And rescue dogs have been known to find avalanche victims by scent, locating people buried under as much as 5 meters of snow.
