I love dogs.  The dog is member of the genus "Canis" and is the most abundant land carnivore. 
I love dogs, as well.  Man's best friend.  They are the most soulful pet, in my opinion.
The dog was the first animal to be domesticated. 
I would imagine.  They are very useful animals.  I know that people still employ sled dogs in the arctic.
Since dogs have been domesticated for so long they can take in a starch rich diet with no ill effects. 
I guess they didn't naturally evolve to eat grains.  I had never considered that their domestication led to that.
They've been found buried with human remains going back 36,000 years ago.