From the perspective of dogs’ vision, dogs should be counted as “color-blind”, but for dogs, they can see and feel more of the world than we humans imagine, because they Has a very powerful olfactory system.
Dogs have a well-developed olfactory system and use their noses to “see” the world
In terms of distance, dogs have a more “three-dimensional” sense of smell, which means that their two nostrils can independently perceive the type and source of smells.
In addition, they allow air to flow in from one nostril and out from another, sorting odor information through hundreds of millions of olfactory perception units along the way.
These sensory units then send huge amounts of information to the olfactory bulb part of the brain, which is apparently much larger in dogs than in humans.
The dog’s olfactory system has even been developed to “see” (smell) objects that ordinary people cannot, and even hormones excreted by humans or other animals.
Dogs can then use this information to determine whether there are potential mates around, whether their human friends are pregnant or sick, and whether a particular creature is friendly or hostile.
