An animal’s diet is not only based on their environment and digestive abilities, but also due to their physical features. There are three main classes of animals in terms of diet. You will have the herbivores including frugivores, who only consume plant matter, and you also have the carnivores, which are usually predator animals that consume only meat. Lastly, you have the omnivores.
For carnivores and omnivores, this means they will eat whatever meat they will get their hands on. Their ability to obtain such meat is dependent on their physical ability. Usually, the bigger they are, the more types of animals they are able to eat. For example, if domestic house cats were as big as lions, you’d bet they would be hunting humans left and right.