 Chocolate contains ingredients called theobromine and caffeine which are toxic to cats if consumed in large enough quantities. Theobromine absorbs much more slowly in cats than it does in humans so even a small amount of chocolate can be toxic to a small cat. Caffeine is similar to theobromine chemically and stimulates a cat much more than a human since cats are much more sensitive to it. Chocolate toxicity in cats can cause a variety of symptoms including death if a cat is not treated promptly. Find what can happen and what to do if a cat eats chocolate can save a life.