1.the single Sweat glands of the dogs are between the claws crow's.
2.the dogs have a night sight better than people
3.Un dog for a year is mentally mature as a man of 15 years
4.The smell of a dog is 100,000 times more powerful than that of a man
5.The dogs judge objects first by their movement, then the brightness and only after then the shape
6.The heart of a dog beat 120 times per minute, ie 50% more than the beatings of a man (80 per minute)
7.The older dog who ever lived was a Queensland "Heeler" named Bluey - lived 29 years and 5 months.