It's probably safe to say that learning how to make a dog vomit isn't on top of your list of priorities. But it's an essential lifesaving skill for all dog parents. "Dogs will be dogs and that means that most will misbehave given the opportunity," says veterinarian Dr. Marisa Scott of Charleston Veterinary Referral Center in South Carolina. "Dogs love to eat things they shouldn't, and this includes items that are toxic and potentially fatal." Chocolate, for example, is extremely harmful for dogs.