Chocolate is NEVER good for dogs, but sometimes it's not bad enough to be noticed. It's all about the size of the dog, the type and the amount of chocolate it has eaten.
Do Huskies have a chocolate tolerance? Due to theobromine and, to a lesser extent, caffeine, chocolate is poisonous to dogs. Theobromine is easily metabolized by humans but not by dogs.

We tend to anthropomorphise and attribute human emotions to our dogs. A good example of this is the so-called guilty look. You often see videos on social media in which a dog avoids eye contact with humans, for example turning its head slightly to the side.

Such details provide a deeper understanding and appreciation for Human Tolerance To Chocolate Vs Dogs.
The human olfactory bulb, which is five to six millimeters in width and only one-third the volume of a dog's, may be plenty big enough to get the job done. After all, it's much larger than the same bulb in a mouse or rat, two animals that are considered to be strong smellers.