If your dog does eat chocolate and they did not get a lot, you need to make sure to keep your dog hydrated with lots of fluids. Usually, just one small piece of milk chocolate will not hurt your dog. It is also best to restrict their diet for several days to a bland food diet that is easier on the stomach.
You will need to monitor your dog for the next three days, and if they ever start showing symptoms, take them to your vet.
While chocolate in large amounts can be very toxic for your dog and make them very sick. If your dog eats chocolate, call your veterinarian or pet poison helpline to see if your dog will experience any of these side effects.
As soon as you start to notice something wrong with your dog, take them to your veterinarian as the quicker your pet is treated, the better the outcome