While dogs are allergic to chocolate, some dogs have a more severe allergy than others. I have to assume there was not enough chocolate in that cake to be a large problem for your dog. Enough chocolate will still almost certainly kill your dog. And that amount of chocolate will still kill some dogs.
Also, I don't know if its true for dogs, but human allergies can develop over time. On the chance that might be true of dogs, it could be possible your dogs allergy gets worse. For this reason I would not allow him to have even a small amount of chocolate
It wasn’t my choice. He’s as tall as a fridge standing, and at this point we didn’t know he could/would stand on his hind legs. I was cooling a freshly iced cake on the counters (almost as tall as me mind you) and in the middle of my shower he licked off the icing
I didn't assume it was on purpose. Sounds like it was frustrating. I'm sorry your dog ruined your cake. I'm also sorry if my comment came off as blaming, it was only supposed to be informative.
Also, I don't know if its true for dogs, but human allergies can develop over time. On the chance that might be true of dogs, it could be possible your dogs allergy gets worse. For this reason I would not allow him to have even a small amount of chocolate