My monkey-climbing dog Ben, got into my son's Easter basket and ate two of those little foil covered chocolate eggs before he was caught in the act. He did manage to get the foil spit out. We watched him all day and he never had a bad reaction. I say this cautiously though as every dog is different. Some have GI problems for weeks over a different brand of food. So, take the advice given, call the vet for reassurance and keep your eye out for a job with a more understanding boss.