Cats are neutral from an ethical point of view. They belong to what Kant has called the world of appearances and are ruled by causality. People have freedom of choice, they have the possibility to transport themselves to the intelligible world of the noumena, the things in themselves. and act in accordance with ethical principles even at the expense of their natural inclinations. If they don't they will enjoy nature fully the next time as a cat, a dog, or whatever natural evolution or any other external causes have in store for them.