How far a dog can smell?

You have heard of sniffer dogs. Dogs are routinely used for catching thieves who have escaped. They are called in when the customs officials want to know if a package has narcotics or bombs. Some studies claim that dogs can sniff deadly diseases in their owners. But for all these dogs are trained.

Dogs have a great sense of smell and can detect tiny amounts of smell diluted in air, water, or far beneath the ground. According to the My Water Earth, the canine olfactory system works so well that dogs can pick up scents that are diluted to 1 or 2 parts per trillion; This allows them to smell things buried as far as 40 feet underground!

Dogs will take deeper, longer breaths for breathing, and use a short sniffing action when smelling something. When a dog exhales, air is pushed out of slits in the sides of the nose, creating an airflow that draws new smells into the nose.

 

Picture Credit : Google