If your dog has eaten chocolate, then make sure to contact your veterinarian immediately. Many vet’s offices keep chocolate information handy, i.e. how many ounces of certain types of chocolate contain mild, moderate, or severe amounts of theobromine. Depending on your dog’s size and the type and amount of chocolate consumed, you may be asked to monitor him for a gastrointestinal upset or you may be asked to help induce vomiting.
It is extremely helpful to have an estimate of how much chocolate your dog ingested. For example, if you found an empty candy bar wrapper, then it is helpful to tell your veterinarian how big the bar was, the brand name, and how much was left in the wrapper.
If your dog ate a tray of brownies, then try to remember how many were left out and, if you used a brownie mix, the brand of mix used. Any remaining chocolate in the area or in your dog’s mouth should be removed immediately.
If you cannot bring your dog to your vet’s office within the first two to three hours of chocolate ingestion, then call your vet, they may instruct you on how much hydrogen peroxide to give to your dog. Hydrogen peroxide is typically used for cleaning wounds, and so you may have some of this in your own medicine cabinet.
When hydrogen peroxide is given to dogs, it causes the release of oxygen bubbles in your dog’s stomach. The bubbles stretch his stomach and cause him to vomit. Fresh hydrogen peroxide is the most effective, so bottles that have been open for more than three months may not work as well. You must also make sure that the hydrogen peroxide is a 3% solution because higher concentrations can cause problems.
Brachycephalic breeds (like Bulldogs and Pugs) and dogs that are weak, seizing, or have heart disease should not be given hydrogen peroxide. If your dog doesn’t vomit within fifteen minutes, then you will need to bring him to your veterinarian as soon as possible.