Many cats are hopeless hunters, hungry or not. If you don't want the cat to be a hunter, redirect its instincts into play. Cats can live on dog food'. Dog food doesn't contain the right vitamins for cats. Feeding a cat exclusively on dog food will eventually lead to ill-health, blindness and death.
Cats can be vegetarian'.
Cats need the nutrients provided by meat. Feeding it vegetables will lead to stunted growth, blindness and death. There are commercially prepared 'balanced' vegetarian diets for cats, but it is cruel to impose human morals on cats. Cats need milk'. After weaning, kittens may lose the ability to digest milk.