“Vomiting is generally always abnormal and is a vague sign that can be due to many causes, some of which are more serious than others,” says Samantha Kent, DVM, medical director of VEG ER for Pets in Encinitas, California. The most common reasons for puppy vomiting include: Eating too fast: When puppies gobble down their food too quickly, it can lead to regurgitation (throwing up undigested food soon after eating). Dietary indiscretion: Puppies are naturally curious and might eat non-food items, such as poop or garbage, which can upset their stomach, says Joshua Smith, DVM, owner of Pawspital Animal Hospital, in Meridian, Idaho. Food sensitivities or diet changes: Switching your puppy’s food too quickly or feeding something that doesn’t agree with their stomach (treats, people food) can lead to digestive upset. Intestinal parasites: Roundworms, hookworms, and other parasites are common in puppies and can cause vomiting, diarrhea, and other gastrointestinal issues. Infections or illness: “Puppies are still building their immune system and are more vulnerable to viruses or bacteria that can cause nausea and vomiting,” Dr. Smith says. The most serious cause of vomiting in puppies is parvovirus. Foreign object ingestion: If your puppy swallows a toy, sock, or other non-food object, it can cause a bowel obstruction, leading to vomiting. Motion sickness: “Some puppies get carsick just like some people do,” Dr. Smith says. “The motion from a ride can make them feel nauseous, leading to vomiting.” Toxins or poisoning: Ingesting toxic plants, household cleaners, an overdose of supplements or ingestion of medications (veterinary or human, over the counter or prescription), or human foods that are toxic to dogs, such as chocolate, can lead to vomiting. Underlying health conditions: Rarely, certain congenital issues (birth defects) such as liver disease or kidney problems can lead to vomiting in puppies.,Jump to section Why Is My Puppy Throwing Up? 9 Possible Causes Puppy Vomit Color Chart How Can I Help My Sick Puppy at Home? When Should I Take My Puppy to the Vet? FAQs About Puppy Vomiting