What are the characteristics of pigs

Pigs have a very sensitive sense of smell and can smell and recognize any odor. This characteristic plays a big role in the sexual contact between male and female pigs. When a sow in heat smells the boar's odor, even if the boar is not there, it will show a "frozen" reaction. At the same time, the boar can keenly smell the odor of the sow in heat, even if the distance is far away, it can also accurately identify the location of the sow, so it can be used for heat identification. Pigs have strong auditory discrimination ability, can finely discriminate the intensity, pitch and rhythm of sound, and can easily form conditioned reflexes to oral commands and other sound stimuli. Pig's vision is very weak, lack of precise discrimination ability, visual distance, small range of vision, not close to the object can not see things, the shape of the object and the color of the ability to distinguish poor, is a high degree of myopia plus color weakness.