RE SQAD's THEOBROMINE, EVEN A LITTLE BIT CAN BE BAD.
This is COPIED FROM WIKIPEDIA.....
Animals that metabolize bromine more slowly, such as dogs, can succumb to theobromine poisoning from as little as 50 grams of chocolate for a smaller dog and 400 grams for an average-sized dog. The same risk is reported for cats as well, although cats are less likely to ingest sweet food, having no sweet taste receptors. Complications include digestive issues, dehydration, excitability, and a slow heart rate. Later stages of theobromine poisoning include epileptic-like seizures and death. If caught early on, theobromine poisoning is treatable. Although not usual, the effects of theobromine poisoning, as stated, can become fatal.
The toxicity for (pet) birds is not known, but it is typically assumed that it is toxic to birds.