Why can’t dogs eat chocolate?

We learned by visiting a few websites, that chocolate has theobromine and caffeine.  Both of these substances are bad for dogs. Dogs cannot digest theobromine and it is a diuretic which potentially causes vomiting, diarrhea, rapid heart beat and seizures – none of which are good for dogs and if extreme, it can be fatal.

We read about theobromine on Wikipedia and it was a bit advanced for us – http://en.wikipedia.org/wiki/Theobromine – but if you are interested see the entry.