To achieve a long life and the health they deserve, pets should eat food that nature intended them to eat, just as their wild ancestors did.   Evolutionary biologists have found that ancient canines adopted pack-living about 8 million years ago and they determined the best way to take down larger prey was to work together in a group – the spoils were shared and nothing was to go to waste.  Eating was a survival action, in that the individual dog had a certain time to eat as much of the good part of the animal before the rest of the pack, so the canine digestive system...