There is a correlation between the size of the dog and the amount consumed. And it helps if it is milk chocolate rather than dark. Glad she was ok!I understand that chocolate is supposed to be toxic to dogs - but several years ago our Lab polished off an unopened box of chocolates at Christmas while we were out - was fine afterwards. Perhaps her size assisted in dealing with the chocolate? Thought I would share this story as we were initially concerned but vet's office told us to observe and if we noticed any serious concerns to bring her in. I am sure this happens more often than one would expect - our canine pals can be very fast and sneaky when they want! Hopefully your experience will be similar. Good luck!
So happy he is alright!!Thought I would give an update: After speaking to my vet and some friends, I took a "wait and see" approach and just kept an eye on him for the day. He showed no signs of any stomach issues or sugar high, although I'm not sure how I would be able to tell the difference since he is already a high energy puppy. All my research and advice says that cooking chocolate is the big concern and a small amount of milk chocolate is unlikely to cause any major problems but all chocolate contains the toxic ingredient "theobromine"