Some lists get a bit carried away. It's all in the quantity. Sugar isn't poisonous, just not good for the buns if you give them too much. Sugar overload causes problems by upsetting the balance of bacteria in their digestive systems, not to mention being fattening (oddly, the same is true for humans).Craisins have as much added sugar as candy. Then lists warn not to give a natural carrot, due to too much sugar.:?