I thought this article about the dangers of chocolate was helpful and informative.
I've blogged previously about chocolate, because I'll have to admit this substance plays a big part in the diet of our household, despite any resolutions to the contrary.
I recall I was horrified to learn that even a little bit of cocoa would harm Penny. Some of her humans - me included - wouldn't think the day was complete without two cups of strong, dark Dutch cocoa. So the jar stays high up in a cupboard when not in use, with the lid tightly screwed on.