The dog is born with their sense of smell, the sense most used to interpret the world and

communicate with other animals throughout their lives.

The dogs have 100 million olfactory receptors in the nose, compared to 5 million in the

man’s nose.

The dog’s sense of smell is so great that certain races can identify a smell even if they

have already spent several days or if it has rained and the smell has been exposed to rain.

Although the species in general has a very good sense of smell, the ability to track and

identify odors depends on the breed and also the substance sought. While sniffer dogs have

a greater ability to track and distinguish odors, other breeds such as brachycephalic dogs

(the Pug and Boxer, for example), use less nose.

The odor is essential for communication between dogs

The odor is a major part of the communication between the dogs. Dogs communicate

through their smell where they’ve been and who they are from mark territory with their

urine, even scratch the ground to stop the smell of her foot on the floor.

Females, for example, use the pheromones (chemicals captured by their peers) to

communicate to Marchos soon be ready to mate. During this period, the female urinate

more often to alert males on their status. Interestingly, males on receiving the signal they

know they have to wait, because if they tried to mate at this time, they would be rejected.

Then approach the female, lick, and wait for her pairing consents.

Puppies use smell to identify their mother and siblings. The smell is also used to identify its

owner among other human beings.

Dogs use smell to locate the source of the smell

In the same way that dogs use their ears to distinguish the direction and distance of the

sound, it uses its snout to determine the direction and source of the odor.

The first to receive nostril odor passes signals to the brain about the location of the odor.

The dog’s brain processes this information, along with the differences between odor

received at right and left nostril. With this information, you can identify the direction of the


Smell is an essential tool in education and training

Dogs should be encouraged to use their sense of smell in their daily lives. Educating the

dog, whenever possible, should incorporate elements of tracking and localization odor.

Especially with dogs that smell like, these exercises provide fun and mentally stimulate the


Thanks to the strong sense of smell, dogs can be trained to identify diseases in humans.

Several studies have shown that dogs are able to detect several types of cancer in their

owners, and foresee events such as seizures.