My mom's RB Min Pin ate a half bag of chocolate chips and we took him to the ER vet. They gave him the activated charcoal and he was fine. The only reaction he had was his little heart was racing. Felt like it was going to beat out of his chest.
Our RB Cocker somehow got into the fridge out in the garage and ate from a dish of brownies I had put in to cool. No trip to the ER and he was fine. I just kept an eye on him. He did not have the racing heart or any effects.

It sounds like you've got it handled. And I will be hoping Sugar will be fine. Hey Sugar....no sugar for you!!! Especially chocolate!!!