Please remember that chocolate can be toxic to our pets. Chocolate is derived from the roasted seeds of Theobroma cacao, which contains certain properties that can be toxic to our pets. (Chocolate and caffeine) If ingested these two ingredients can possibly lead to poisoning or may even be fatal for your pet.
Google the Chocolate toxicity calculator below and simply put in your dogs weight. The amount of chocolate and what type of chocolate it was this will calculate if your dog requires veterinary assistance or not.