So what is it exactly that is in chocolate that makes it poisonous?? We had a greedy wee ****er spaniel that stole loads of chocolate biscuits, edible christmas presents etc and it lived to a ripe old age. Not only that but he was never sick- infact the only thing that he stole that ever made him sick was pizza! I stress that all chocolate was stolen and at no point offered to the dog! For example if you forgot to put the chair under the table he would be on the table! Just wondering thats all. Anyone help??