The Dog Nutritionist on Instagram: "Can dogs eat chocolate? No. It’s dangerous, here’s why and what to do if your dog eats chocolate. Chocolate varies in danger to your dog. The darker and more bitter the chocolate, the greater the danger to your dog. All chocolate contains caffeine and theobromine, which can be toxic to dogs, but different types of chocolate contain different quantities of these compounds. Use this chocolate toxicity tool to assess the likelihood your dog needs to go to the Vet