- Less than 1% of your brain is used for smell. More than 12% of your dog's brain is dedicatated to olfaction.
- You have 5 million scent receptors. Your dog has over 300 million.
- Whereas the scent detecting tissue in the human nose is equal to the size of a postage stamp, your dog's tissue is equal to the surface of her body.
|You smell the fragrance of a flower. |
Your dog smells every visitor.
|When your dog digs a hole, it's like|
reading a history book. She knows
who was there and when they visited.
How does it work?
Scientists don't fully understand how the canine olfactory system works. But it's safe to say that dogs see in smell. The nose and the brain work in unison to process odor. Your dog has to activate her sniffer to smell something, just like you have to open your eye lids to see something. When your dog sniffs, she first forces air out to disturb the chemical molecules in the odor which she then pumps back into her nose as she sniffs again.
Look at the distinct patterns of swirls and circles on your dog's nose. Like fingerprints and snowflakes, no two wet cold noses are ever the same. In some countries, canine nose prints are used to identify lost or stolen dogs. The Canadian Kennel Club has been doing this since 1938.
To read more about canine olfaction check out this article - What a dogs nose knows