Asian and other 'Exotic' veggies
Correct me if I am wrong, but here goes. Sugar is a carbohydrate and most species of animals don't tolerate them well. Horses (we have two), pigs, rabbits, chinchillas, etc are animals that especially don't process sugar well. It does cause gas and colic in horses, stasis in the exotics. Just a quick answer, but I think that is the answer to what was asked.