Do you have a dog? I have 2. 
I have two dogs, Dogs are selectively bred for certain behaviors and physical attributes
I have read about that. Do you know why the pug was bred?
I don't know about Pugs but dogs have associated with humans so long that they are tuned in to us
That's a nice thought. My dogs seem too dumb for that though. 
Many dogs are bred to hunt, pull cart loads and herd, my dogs herd livestock
Mine tries to herd birds but she doesn't realize they have wings. What'a your favorite fact about dogs?
Many dogs serve a therapeutic purpose by aiding the handicapped
That is a good one. Good boys. And girls. 
Dogs are known as mans best friend because of the influence they have on the human world