My sister once spilled a packet of chocolate raisins on the floor. We only got half of them back, Sam turned into a small vacuum cleaner and polished off the rest! I know it's not good for them, but fortunately there were no ill effects.

We also have to be careful with silver paper, like chewing gum wrappers, kitchen foil etc. Silver paper balls are about the only toy he's not scared of, but he has to be supervised, otherwise he runs off to his food-dish, has his dinner and eats the silver ball for dessert.