10 Things About Dogs You Didn't Know

1. The relationship between humans and dogs as their pets dates back to 12,000 years.
2.  Everything is not black or white for the dogs. Dogs have two cones in their eyes, which enables them to see colours on the scale of blue and yellow. 
3. If not spayed or neutered, a dog, her mate and their offsprings could produce as many as 66,000 dogs within a span of six years.
4.  Dogs can understand up to 250 words and gestures!
5. An estimated 1,000,000 dogs in the USA have been mentioned in the primary wills of their owners.
6. The Beatles' song, A Day in the Life, has an extra-high pitch whistle in the end. The whistle was especially incorporated for Paul McCartney’s Shetland sheepdog.
7.  Border Collies, the workaholics of the dog world, are considered to be the most intelligent breed. 
8. Afghan Hounds, on the contrary, are popularly considered to be the dumbest dogs.
9.  The famous Saint Bernard breed gets its name from the Great St Bernard Hospice, located in the Swiss Alps. The sanatorium used these gentle giants of dogs to rescue victims from the snowy Alps.
10.  A dog’s sense of smell is 10,000 to 100,000 times stronger than that of humans.