The Nose Knows

The Nose Knows

by Jan Marinelli, Canine Coach      www.janmarinelli.com          802 373 9857

 I am in awe of the incredible sense of smell that dogs have. Difficult for humans to comprehend, but their noses are far more sensitive and complex than ours. For starters, dogs have many more olfactory receptors than humans. Humans have about 5 million olfactory receptors in their noses and dogs have about 220 million. Dogs can smell layers upon layers of scents even when we can smell nothing. Add to this, the dog’s snout is structured in such a way that, while sniffing an odor, dogs do not exhale and disturb even the faintest of scents. To top it off, the part of the brain in dogs that processes smells is seven times larger than in humans. Those are some impressive stats.

 No doubt about it, humans smell to dogs. That is why some dogs will greet you with a nose directly to the groin region, preferably with a circle of squeamish humans watching in disgust. The dog is just, ‘taking your inventory’ so to speak. We meet people and make small talk; dogs meet others by sniffing private parts. 

A dog’s nose can detect fear or sadness because canines pick up on the scent of adrenaline and norepinephrine, the fight-or-flight hormones. A fearful human exhibits an increased heart rate and blood flow that sends specific body chemicals to the surface of our skin, which a dog can sense. Think of the variety of working dogs humans employ to sniff out explosives, illicit drugs, cancers, and diabetic reactions, not to mention the complexities of an individual experiencing a Post-Traumatic Stress reaction. These are all amazing canine olfactory feats.

When you’re out walking your dog and she stops to sniff another dog’s genitals, know that this is important dog communication. When dogs sniff each other, it is the equivalent of a handshake. They are discovering important details about the new canine, ranging from what the new dog last ate, whether it is stressed, and an estimate of how old she is. 

When dogs mark all over the neighborhood, they are communicating with other dogs. Sniffing trees and then promptly leaving their mark is the dog’s way of participating in the neighborhood gossip column. Dogs can find out if another dog is a male or female, if it is one they are familiar with, and whether that dog is currently nearby.

Sniffing makes a dog feel good. A dog’s natural sniffing behavior is generally a calm and relaxing activity. The mental enrichment your dog gets on a slow walk with lots of time for sniffing is usually greater than it would get on a fast-paced, walk to heel next to its human.

HINT: A shorter sniffy walk can tire a dog out and relax her.  

So, next time you are out on a walk with your dog, don't get impatient when she wants to stop and sniff; embrace it and you might just find you have a happier dog as a result.