Can Dogs Eat Milk Chocolate?

Milk chocolate is the most commonly encountered chocolate in most households, and while it's less concentrated in theobromine than dark or baking chocolate, it's still genuinely toxic to dogs in a large enough amount. A dog's body can't clear theobromine as efficiently as ours, so it builds up over time and overstimulates the heart and nervous system. A single small square is unlikely to cause more than mild stomach upset in a medium or large dog, but a whole bar, or any amount in a small breed, can be enough to cause a real problem. Because the exact toxic dose depends on both the size of the dog and how much was eaten, it's always worth calling your vet to work out whether the amount involved is a genuine concern, rather than guessing at home.