5 Differences Between Dogs & Humans You Won't Believe

1A dog's sense of smell

Dogs have a much stronger sense of smell than humans, as their olfactory nerves are densely distributed on the nasal mucosa. The olfactory nerves in dogs are more than 40 times more sensitive to odors than humans, allowing dogs to distinguish more than 20,000 different smells. A dog's sense of smell is so strong that it can identify the sex of other dogs, the state of estrus, parent-child identification, and even detect food and prey through scent alone.

So, people use dogs' sensitive sense of smell to train military dogs and police dogs for criminal investigation, anti-drug, bomb search and rescue work, and other jobs that people cannot do.

2Dog hearing

Dogs have better hearing than humans. This is because the sound frequency that human ears can receive is 200,000 to 20,000 cycles. If the frequency exceeds this range, the human eardrum cannot be vibrated. But dogs can receive 150,000 to 50,000 cycles and can hear ultrasonic waves that are impossible for human ears.

Dogs can hear sounds at a frequency of 60---65000hz, while people can only hear sounds at a lower frequency, 20---20000hz. Therefore, dogs cannot hear sounds greater than 20hz and less than 60hz, but humans can hear them; greater than 20000hz and less than 65000hz. People can't hear the sound, but dogs can hear it.

3Dog Vision

Dogs have poor eyesight—their vision for stationary objects extends only 6-10 meters. Therefore, moving objects are far easier for them to detect. Additionally, dogs see only in black, white, and gray; however, some trained guide dogs can distinguish between different shades of color. Dogs' necks are long, and their heads are flexible, which allows them to compensate for their visual handicap.

4Dogs use their tongues to dissipate heat

Dogs are actually very heat-intolerant animals because they don't have sweat glands on the surface of their skin, and they don't take care of themselves to replenish water in time. The sweat glands of dogs are mainly concentrated on their tongues and foot pads. So when dogs feel very hot, they usually breathe with their mouths wide open, with their long tongues hanging down, and use their tongues to evaporate heat.

5Dogs are prone to urinary tract diseases

Urinary diseases are common in middle-aged dogs and male dogs. Because their urethral structures are narrow and twisted, they are easier to cause bacteria and sticky urine adhesion, which can lead to urinary tract infection. Don't underestimate the dog's urinary system disease, as it may cause blood in the urine, dripping urine, or even blockage of urine discharge. If you find your dog suffering from such a disease, it is recommended to seek treatment as soon as possible.