Dogs are awesome. They were the first species to be domesticated. 
They are awesome! I find it amazing how many species are in existence.
There are so many because they have been selectively bred over thousands of years for various behaviors and physical attributes
This is true, I personally prefer bulldogs. Did you know the American Bulldog was bred to hunt boar?
Interesting, I did not know that. Dogs perform lots of roles for people, such as hunting, herding, protection, and companionship