Puppies are curious and commonly eat things they should not. Their small size also means vomiting and diarrhea can lead to dehydration and low blood sugar faster than in a healthy adult dog. Do not assume these symptoms will resolve on their own in a very young puppy.
Possible causes
Diet changes, parasites, swallowed objects and infections are possibilities. Parvovirus is especially concerning in puppies that have not completed their vaccine series. It can cause rapid-onset lethargy, vomiting, diarrhea, sometimes bloody stool, and dehydration. A veterinarian can perform a fecal parvovirus test when indicated.
Call early rather than trying medications
A puppy who vomits repeatedly, refuses food, has watery or bloody diarrhea, seems weak, or cannot keep water down needs prompt veterinary assessment. Severe abdominal pain, collapse or difficult breathing is an emergency. Never give over-the-counter adult human anti-nausea or diarrhea drugs to a puppy without veterinary instructions.
What to track before the appointment
Note the puppy’s age, weight, vaccination history, energy, appetite, vomiting frequency, stool appearance and access to trash or toys. If infectious diarrhea is possible, avoid exposure to other dogs and call the clinic before arrival. Do not withhold water or fast a sick puppy on the basis of general online recommendations.
Protecting puppies in the future
Follow your veterinarian’s vaccination and parasite-prevention program. Avoid high-exposure dog environments until your clinic advises your puppy’s vaccination series is complete. Learn about when vomiting needs a vet and digestive emergencies.
Veterinary references
- Cornell University: Diarrhea in Dogs
- Merck Veterinary Manual: Vomiting in Dogs
- Cornell University: Parvovirus
General information, not a substitute for an examination. Puppies and dogs with signs of dehydration require prompt veterinary assessment.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.