The Nose Knows: Why Smell Is a Dog’s Superpower

If you’ve ever watched your dog stop mid-walk, nose twitching and tail still, you’ve seen something special. For dogs, smell isn’t just one of the senses. It’s how they explore the world, connect with others and make sense of everything around them.

In this blog, we’ll take a closer look at how dogs use their incredible sense of smell, why it’s so powerful and how you can help support it throughout their life.

What Makes a Dog’s Nose So Special

Do you ever wonder what makes your dog’s nose so special? Here’s what’s really going on.

A dog’s nose isn’t just a smaller version of ours, it’s actually built for scent. One quick fact we wanted to highlight from ASPCA: humans have around 5 to 6 million scent receptors, dogs can have up to 300 million, depending on the breed. Their olfactory bulb, the part of the brain that processes smell, is about 30 times larger than ours, giving them an incredible ability to detect even the faintest odors; scents we’d never notice. (1)

So put simply, when your dog stops to sniff, they’re not just taking in air. They’re collecting layers of information. Each nostril works on its own to locate where a scent is coming from, while tiny slits on the sides of the nose let old air escape so new smells can come in. It’s an incredible system made for constant discovery.

How Dogs Smell What We Can’t

Did you know that dogs have a second scent-detecting organ called the vomeronasal organ, commonly known as Jacobson's organ, in addition to their primary olfactory system? This organ, located on the roof of the mouth, detects pheromones, which are chemical signals that tell dogs about another animal’s mood, mating readiness and identity.

This is why dogs can sense things that humans often miss. They can detect tension, fear and even certain medical conditions in people. Research also shows that dogs can identify changes in body chemistry, such as shifts in blood sugar, early signs of cancer or other illnesses. 

A dog’s nose lets them experience life on a deeper level, catching details and emotions that we’d never notice.

How Dogs Use Their Sense of Smell

So, how do dogs really use their amazing sense of smell in everyday life? Let’s take a look.

#1. To Recognize People and Animals

Your dog knows you by scent before sight or sound. Your unique smell is stored in their memory as comfort and familiarity. Dogs also use scent to recognize other animals, even those they haven’t seen in a long time.

#2. To Gather Information

Every walk is an information mission. That fire hydrant or patch of grass you find unremarkable? It’s a message board of who’s been there, what they ate and how they were feeling. Dogs “read” the world with their noses the way we read words on a page.

#3. To Detect Emotions

Dogs can smell changes in human hormones related to stress, fear or happiness. This is why your dog may come closer when you’re sad or back off when you’re tense. They aren’t guessing, they’re sensing changes in your scent profile.

#4. To Navigate and Remember

Dogs build scent maps of their environments. They can follow a trail days later or find their way home using olfactory memory. Their noses store a library of familiar smells like people, routes and even specific places.

Do Some Breeds Smell Better Than Others?

While all dogs have excellent noses, some are genetically gifted. 

Bloodhounds, for example, have the best scent receptors of any breed, and can track a scent trail that is days old. Beagles, German Shepherds and Labradors are also excellent scenters, which is why they are commonly utilized in detecting work.

Breeds with shorter snouts, such as bulldogs and pugs, may have less olfactory surface area. That doesn't mean that they have a poor sense of smell, it’s simply less intense when compared to long-nosed breeds. 

No matter their size or breed, every dog experiences the world first through their nose.

The Simple Ways to Encourage Healthy Sniffing on a Daily Basis

Sniffing isn’t just instinct, it’s mental exercise. Dogs who get to explore through scent are often calmer, happier and more confident. 

For example, letting your dog set the pace on walks gives them time to take everything in, turning an ordinary outing into a “sniff walk” full of discovery.  

You can also make scent time fun at home by hiding treats for them to find or using puzzle toys and snuffle mats that tap into their natural foraging instincts. 

Even changing your walking route once in a while gives your dog new scents to explore and keeps their curiosity alive.

Additional Ways to Help Your Dog Long-Term

Supporting your dog’s sense of smell long-term isn’t super complicated, it just means giving them chances to use it. Try to: 

• Give Variety:  Let your dog sniff new places, meet new dogs and experience different environments.
• Use High-Quality Treats and Foods:  Smell is tied to taste. At Eva, our curated selection of nutrient-rich foods and treats keeps your dog excited and engaged.
• Create Calm Spaces:  A stress-free home helps dogs process sensory input more effectively.
• Encourage Exploration:  Hide toys, scatter treats and make scent a natural part of playtime.

Amazing Facts About Your Dog’s Nose

Now that we’ve gone over how dogs use their sense of smell and how to support it, let’s quickly look at a few fun facts about canine detection.

Dogs can be trained to find explosives, locate missing people and even detect early signs of illness. Their noses are so sensitive they can also identify scents in parts per trillion, making them incredible partners in health, safety and conservation. 

Support Your Dog’s Natural Instincts with Eva

Your dog’s nose connects them to the world and shapes how they think, learn and love. At Eva, we honor that amazing instinct with high-quality food, sensory treats and cozy essentials designed for everyday comfort. Show your pup some love today and visit our website to explore more!  

 

Written By Megan Berry

1. “Super sniffers: the power of a dog’s nose.” ASPCA. Referenced from: https://www.aspcapetinsurance.com/resources/power-of-dogs-nose/