Puppies sniff, they really do! This refers to the excellent olfactory capability of our furry friends and not on the one the other one that makes you wrinkle your nose. Although dogs also have the propensity to dig and roll on something that seems to have died months ago and makes the owner give the dog a good bath.
When you see your dog sniffing the grass, the plants, sniffing the food, sniffing each others behind, sniffing you and other people, did you ever wonder why they do? The dogs nose is considered to be their most excellent "equipment". The nose is one of the reasons why primitive dog survived in the wilds. Apart from scenting the prey, the excellent sense of smell enables to dog to avoid danger.
Dogs sniff a lot as by doing so they can understand other dogs well. Have you noticed a dog sniffing other dogs backside? This is done to identify the dog. Dog have a personal and unique smell. This is the counterpart of the humans finger prints. Through sniffing the dog identifies if the other dog is friendly, one he can play with or a threat that he should be wary of.
They are loyal and would give their life to protect the master. But aside from this, dogs can empathize with the emotional state of human. The outstanding olfactory capability enables the dog to tell the difference between tears of joy and tears of pain and sadness. Notice how your dog would lean on you, would snuggle at you when you are sad. The dog is offering comfort. Dog sniff other people to identify if they are not a threat. When you let a visitor enter your home, the dog would immediately sniff the stranger.
A dog can tell if a pooch is pregnant by sniffing but did you know that our furry friends can also tell if you are not well? This ability is not due to a sixth sense. This is possible because the dog has a sense of smell that is several million times better than human. Merely by sniffing, a dog can tell if a woman is pregnant. Studies conducted have verified the ability of the dog to tell if a person has a certain kind of cancer. This is also true with some other kinds of ailments.
Sniffing dogs have become excellent partners of the police force. Because of the excellent smelling ability, the dog has become an invaluable helper in search and rescue operations as the dog can find people buried in rubble and in the snow. Dogs have excelled in narcotics and bomb detection because of their excellent scenting abilities.