A recent study shows what many have “known” about the power of a dog's nose
A dog's nose knows.
A dog's nose is a work of art, an organ that's evolved to be an incredibly sensitive to a wide variety of odors. Dogs put their noses in all sorts of places, many of which we find disgusting or offensive but that's what it's like to be a dog and we have to accept that's how they sense their world. Not allowing dogs to sniff can be seen as a form of sensory deprivation that robs them of vital information they need to navigate their surroundings including odors from the mouth, ears, and other areas of the body including those very special private parts of other dogs, other animals, humans, and yes, pee, poop, and a wide variety of stinky stuff they crave and savor and we find utterly revolting.
via Whisker Therapy