Can we change?

Let me tell a very short story: As I walked around on a rainy day, the rain is pounding hard on the wet sand-filled path. Then, I notice a cat (or I think it's a cat) cringing from the force of the rain. Feeling pity, I pick up the cat and bring it home with me. I construct a cage where the cat can stay and live. Before one gets sentimental, there are some things one should know about the cat. It is a carnivorous cat; one that has never eaten vegetables before. The cat has always lived in the forest where I found it, and that is the only home the cat has ever known. But, now that the cat lives with me, the only food I place in the cage are vegetables and water. I place different vegetables for breakfast, lunch, and dinner. But, no trace of meat at all. Now, there are only two possible outcomes: either the cat becomes a vegetarian or the cat dies. What outcome is it? Does the cat adapt or does it die? Should it adapt? Or, better yet, can it adapt?