I love dogs, especially collies!  Are you a dog lover?
I am a dog lover actually. Collies are some of my favorite dogs. It's amazing how they are used as a herding dog.
What is a herding dog?  I am unfamilier with that term.
A herding dog is a type of working dog which has been trained in herding other animals. One example is herding sheep for instance.
That is awesome!  I had no idea.  I would assume that means these dogs are really smart, right?
Yes they are incredibly smart and trainable. They are trained to act on the sound of a whistle and this has made them renowned globally.
Where did the collie originate from?
Collie
Collies form a distinctive type of herding dogs, including many related landraces and standardised breeds. The type originated in Scotland and Northern England. Collies are medium-sized, fairly lightly built dogs, with pointed snouts. Many types have a distinctive white color over the shoulders. Collies are very active and agile, and most types of collies have a very strong herding instinct. Collie breeds have spread through many parts of the world (especially Australia and North America), and have diversified into many varieties, sometimes mixed
collies became very fashionable. In the 1960s, the collie was much taller and bigger than it is today. Decades ago, collies were used for herding but they were replaced by Border Collies, it caused some collies to lose their herding instinct.
Temperament.
While often used as a working, herding dog, many are kept as family pets, as they are friendly and good with children. This type of dog is also friendly with other dogs and even non-canine pets.
Height, weight.