Chocolate is a known toxic for dogs and either can lead to serious illness, medical issues or even fatal. I would hope they would look into things like this before advertising it on tv shows as others may follow suit and feed dogs chocolates unknowingly.
If CVS or anyone from the cast/crew of SSEL is reading this please be aware of this.
Edited to add some links with some more information about items that are toxic/poisonous to dogs.
Here is a very thorough list of items from the pet poison hotline (there are a lot of food, plants and household items amongst others that are harmful to dogs on it):
http://www.petpoisonhelpline.com/poisons/
and here's one for the top 10 items (you will note that chocolate is 1st on the list!):
http:////www.petpoisonhelpline.com/pet-owners/basics/top-10-pet-poisons/