The "canine" teeth in humans are in name only because they resemble canine teeth but they do not share the same tearing ability sharpness and power as our canine friends. You will find it is quite difficult to chew into a raw animal. In nature animals such as our canine friends do not cook their food.
Its been proven that the human digestive system most closely resembles that of fruit eating animals. A long intestine will absorb more juice of the quickly moving fruits. Meats raw or cooked do not move as quicky in a long digestive tract and start to rot and cause more disease. Carnivores such as dogs and cats have much shorter digestive systems to quickly digest and expell.
Bottom line is that humans are not designed to ingest and digest animal flesh as efficiently as carnivores. For optimal health humans should be mostly raw fruit eating herbivores.
And so it is shown that meat eating is unatural for humans, it goes against our natural human design.