^^^ cats are hypercarnivores, obligate carnivores ... they must eat other animals to survive (American lion skull).
^^^ dogs are carnivores but are more generalist than cats ... approx. 10% of wild dogs' diet is plant/vegetable/fruit - including the stomach contents. You can feed your pet pooch tiny amounts of broccoli, kale, carrot or apple (skulls of grey wolf, red wolf and coyote).
^^^ pigs are omnivores ... they eat plant matter and animal matter, whatever they can find (warthog skull).
^^^ horses are herbivores ... they must eat plant matter to survive (Grant's zebra skull).
^^^ T-rex skull ... does it look like a herbivore to you?