Some Awesome Facts about a Dog’s Perfect Sense of Smell, Hearing and Sight…
What does it really mean when someone says, that "the nose knows best?"
Well, dogs naturally have a wonderful sense of smell. They have many more sensory 'smelling' cells than a man's 5,000,000. A Dachshund, for example has 125,000,000; a Fox Terrier has 147,000,000 and a German Shepherd (often used as a 'sniffer' dog) has 220,000,000. Truffle hounds can find the fungus delicacy even when it's a foot underground! However, A dog's nose is not just used for smelling, but also to keep him cool. That's why a dog pants. The longer the dog's nose, the better his cooling system works.
What about a dog's hearing?
Well, a dog can hear sounds 250 yards (230 meters) away that most people cannot hear beyond 25 yards (23 meters). The human ear can detect sound waves vibrating at frequencies up to 20,000 times a second. But dogs can hear sound waves that vibrate at frequencies of more than 30,000 times a second!
And their eyes?
Dogs cannot see as well as humans. This is a misconception. They see object just fine, but in a differnet way than humans do. A dog sees objects first by their movement, second by their brightness, and third by their shape. Dogs can see color but it is not as vivid a color scheme as we see. It is much like our vision at twilight. Dogs DO have better low-light vision than humans, however because of a special light-reflecting layer behind their retinas called the: tapetum lucidum (bright carpet in Latin).
It seems the saying is right.....the nose does know best.....