Consuming 100g of chocolate can be perilous for a dog. Chocolate contains theobromine and caffeine, which are harmful to dogs. The effects depend on the type of chocolate and the dog’s size. Dark and baking chocolate have higher theobromine levels and can lead to severe symptoms like vomiting, diarrhea, increased heart rate, tremors, seizures, and even death. Immediate veterinary attention is crucial. In my experience, I’ve seen smaller dogs react more severely to chocolate ingestion. If your dog eats chocolate, seek vet help swiftly to address the potential toxicity and receive appropriate guidance.