Every dog’s nose is different. The print on a dog’s nose is comparable to a fingerprint. But that’s not the only thing that makes your dog’s nose unique. In this blog, we’ll take you into the fascinating world of the canine nose and explain the special characteristics it has.

Separation of Scents

Did you know that dogs can separate scents? Yes indeed — dogs will sniff unknown or unpleasant smells with their right nostril first. Only when they determine the scent is safe and pleasant will they start perceiving it with the left nostril.

A Better Sense of Smell

A dog’s nose can also smell much better than ours. This is because dogs have far more scent receptors. We humans have about 5 million scent receptors, while dogs have between 125 and 300 million. So where we smell an apple pie, they can easily distinguish each individual ingredient.
This has nothing to do with the size of the nose, by the way — a mouse can smell even better than a dog because it has even more receptors.

Sniffing Respiration

Dogs are also capable of “sniff respiration.” In this mode, their breathing rate increases from an average of 10–30 times per minute to 120–200 times per minute. This allows many more scent molecules to pass through the nose and be detected.

Renewal of Scent Receptors

The receptors in a dog’s nose are replaced every 30–60 days. They are renewed with receptors that recognize the scents the dog is most frequently exposed to — because those are the ones they need.
This is why detection dogs trained to find explosives, for example, are incredibly good at detecting even tiny amounts of them: they are exposed to these scents frequently during training.

No two dog noses are the same!