✅ Visual ability
Studies have shown that dogs do not have particularly good eyesight. Compared to humans, a dog's vision is only about three-quarters of a human's, so a dog is nearsighted, and it has one-third of the eye adjustment of a human. But dogs have a special ability to detect moving objects, and can detect images that move at 70 lines per second, compared to 60 lines per second for an ordinary TV image. So dogs are able to remember their masters through their eyes and are happy to greet them whenever they see them.
✅ Hearing ability
According to tests, dogs have a hearing range between 15-50,000 Hz, while humans can only hear vibrations from 16-20,000 Hz. From a large amount of data, it is clear that the hearing range of a dog is twice that of a human, but in fact, it is much more than that, because some dogs can hear vibrations of up to one million Hz. So dogs have a well-developed sense of hearing, they can hear a much wider range of audio than humans, and while every human voice is different and distinctive, dogs are the most sensitive to their owner's voice.
✅Sniffing ability
The sensitivity of the dog's nose is higher than that of humans, the dog's nose can distinguish about 2 million different odors, and also has a high analytical ability to smell the smell that is looking for from a lot of mixed odors, especially the owner's scent, no matter how long it has been they will not forget it, so the dogs can easily distinguish whether there is a smell of their own owner among the people in the vicinity.
