When two dogs meet in a friendly way, they always start with mutually sniffing the hint? But why do they do that?
An overdeveloped smell
I like humans, and dogs can count on their meaning. It is the smell that is the most developed meaning in the canine world.
Indeed, the dog smell is about 100,000 times more sensitive than ours, partly because its truffle contains 150 million olfactory receivers while a human nose has only 5 million. In addition, dogs devote about 30% of their cerebral function to the detection and identification of odours, while humans use only 5% for olfactory purposes.
In addition to these outstanding capacities to feel, dogs have a special body called the Jacobson organ (also known as the vomeronasal organ) located above the palace. This organ is specialized in the perception of pheromones, chemical messengers participating in the communication between individuals within the same species.
Feel the back, a way of communicating
Thus, when a dog sniffs the back of one of his congeners, it is a way for him to read his “NBSP, new friend & nbsp;” as if he read a brief written biography in odorous molecules.
On either side of the dog anus, there are indeed anal bags that contain a large number of pheromones. When they are sniffed by a congenère, these pheromones inform him about the sex of that or the one who secreted them, and NBSP; on his reproductive status, his health, his diet and even his emotional state.
In reality, in dogs, mutually sniffing the hindrance is neither more nor less than a way to introduce themselves, to take news from each other and to recognize themselves. It’s somehow the canine version of the handshake in the human being!