I have three small dogs.  Another fact about dogs is that the dog and the gray wolf are sister taxa 
That's pretty interesting.  I used to have a small dog, a pug when I was younger.
Love pugs!  Another thing is that dogs and their long association with humans has led them to be uniquely attuned to human behavior
I've always wondered about that.  I've always sensed that dogs know more about us than it seems.
Yeah they are very aware.  Another thing is that dogs perform many roles for humans such as hunting, herding, and pulling loads.
They're very helpful animals, has that always been their nature?  I couldn't imagine the world without them.
Yeah they have always been like that .  This influence has given them the name a man's best friend. 
It really is a very fitting name.  It describes them perfectly.  I've always known dogs to be very loyal to their owners.