My parrot eats chocolate,never noticed anything. Just read this. Chocolate is a highly palatable food. Some of us know that all too well. Unfortunately, many birds seem to love chocolate almost as much as people. Chocolate is not bad for birds just because it is high in calories and fat though, it contains a compound called theobromine. Theobromine is toxic to dogs and cats as well, but birds, again due to their smaller size and more rapid metabolism, may be even more susceptible to its toxic effects.