Dog sniffing is a social behavior

We often see two dogs sniffing each other's butts. This is because dogs have a very sensitive sense of smell and can quickly gather each other's identity by sniffing their butts. Information such as gender, emotional state, food eaten, etc. If you like this taste, the two dogs will become good friends and can play happily together. Sniffing each other's butts is a normal social pattern for dogs. Owners should not force their dogs away, they also need to communicate with their own kind.

Dog’s olfactory system

The dog’s olfactory system is very sensitive, about 3 million times the human olfactory ability, so they can obtain a lot of information with their noses. Dogs can easily distinguish some odors that we humans cannot smell or distinguish. Therefore, when dogs encounter unfamiliar dogs, they usually obtain relevant information through their sense of smell.
In addition, the dog's sense of smell will also have a corresponding auxiliary system. The name of this auxiliary organ is the nose picker. Its specific function is to help the dog better capture information through the sense of smell. In addition, this organ can also store smell information, which is why dogs can remember smells.

The source of dog odor: anal glands

Many behaviors in the animal kingdom are expressed through their own odor, and odor is usually marked through defecation. Therefore, the smell of the dog's anal glands contains a lot of information, and can release information about the dog's diet, gender and even mood at this time. Just like human ID cards, dogs only need to smell each other to roughly understand each other's information when they meet.