- The basenji, an African wolf dog, is the only dog that cannot bark.
- Irish Wolfhounds rank as the largest dog, and Chihuahuas as the smallest dog. The St. Bernard is the heaviest dog and other breeds range in size between these extremes.
- A dog can hear sounds 250 yards away that most people cannot hear beyond 25 yards. 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.
- Dogs cannot see as well as humans and are considered color blind. A dog sees objects first by their movement, second by their brightness, and third by their shape.
Dog Facts
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