I had 10 popular dark chocolate brands independently tested for heavy metals (arsenic, lead, cadmium, and mercury), and healthy cocoa flavanols.
Calculate chocolate toxicity levels for dogs based on weight and type of chocolate consumed.
The levels of toxicity in chocolate vary and are determined by the type. Dark chocolate contains higher levels of theobromine, making it more toxic, especially to pets. White chocolate contains the least, while milk chocolate carries moderate toxicity levels.

Toxic Chocolate Levels for Small Dogs (Practical Guide). Heres a simplified guide to help you understand real-world risk: chocolate toxicity levels for dogs. How this works
Cocoa, cooking chocolate and dark chocolate contain the highest levels, while milk chocolate and white chocolate have the lowest. If youre dealing with any quantity of dark or bitter chocolate, err on the side of caution.

Different types of chocolate contain different amounts of chocolate liquor. This is what accounts for the differing toxicity levels.
Swiss chocolate manufacturer Lindt & Sprnglis offering (the Lindt Excellence Dark Chocolate 70% Cocoa) was among 13 chocolates flagged for containing higher than acceptable levels of cadmium. Despite the test results, the company denies its chocolates pose a risk to consumers.

This particular example perfectly highlights why Chocolate Toxicity Levels By Chocolate Type is so captivating.
Each of the chocolates was then sent to labs and tested for levels of cadmium and lead. They looked at chocolate bars and hot chocolate mixes for the Halloween season, alongside brownie and cake mixes, dark chocolate bars and cocoa powder.