The fun thing, though, is in the first paragraph:
Chocolate, raisins or grapes are "poisonous" for pets, according to the code
I've not checked for raisins and grapes, but it's long been known that chocolate can be harmful to dogs. As snopes has it:
Theobromine [a chemical found in chocolate] affects the heart, central nervous system, and kidneys, causing nausea and vomiting, restlessness, diarrhea, muscle tremors, and increased urination. Cardiac arrhythmia and seizures are symptoms of more advanced poisoning. Other than induced vomiting, vets have no treatment or antidote for theobromine poisoning. Death can occur in 12 to
So chocolate is not "poisonous" it's straight up actual poisonous.