Dogs and cats are hunters and the basis of their teeth structure, jaws, stomach acid ph and whole digestive system is designed specifically to deal with lots of juicy meat and raw bones.
Dogs and cats are carnivores who have evolved to eat a meat and bone based diet.
Today there is an abundance of dry extruded and other industrially processed pet food on the market.
This may be convenient, but is light years away from the food which nature intended dogs and cats to eat.
On a biological level your pet's body is designed and has evolved to digest raw foods and quality proteins rather than processed cooked proteins and starchy or sugary grains like wheat or white rice.