Puppy Health Guide: Common Symptoms and When to Call the Vet
Most puppy health worries fall into three groups: normal quirks you can watch at home, symptoms that need a vet call today, and emergencies that can't wait. Puppies get sick and dehydrated faster than adult dogs, so if you're unsure which group you're in, it's always reasonable to call your vet.
This guide is a starting point, not a diagnosis. Use the table to find a symptom, then follow the link for the full guide.
Go to a vet or emergency clinic now if your puppy:
- Has trouble breathing, or pale, white or blue gums
- Collapses, has a seizure, or can't stand
- Is vomiting repeatedly or has bloody vomit or diarrhea
- Is very weak, floppy or hard to wake
- Has a swollen, painful belly, or is retching without bringing anything up
- May have eaten something toxic
Puppy symptom checker
| Symptom | Often normal when… | Call the vet when… | Full guide |
|---|---|---|---|
| Vomiting and diarrhea | One mild episode, then bright and eating | It repeats, contains blood, or your puppy is tired or not eating | Puppy vomiting and diarrhea |
| White foam vomit | A single episode on an empty stomach | It happens repeatedly or with other symptoms | Vomiting white foam |
| Mucus or blood in loose stool | Rarely normal | It lasts over a day, or your puppy seems unwell | Colitis in puppies |
| Lethargy, vomiting and bloody diarrhea | Not normal | Immediately, especially if unvaccinated | Parvo symptoms |
| Fast breathing | During dreams, or after play or heat | At rest with effort, or with pale or blue gums | Fast breathing |
| Drooling | During teething or excitement | It's sudden and heavy, or comes with vomiting or mouth pain | Excess drooling |
| Dry nose | After sleep, or in dry air | It's cracked or crusty, or your puppy seems ill | Dry nose |
| Hiccups | Usually, especially after eating | They last for hours or come with breathing trouble | Puppy hiccups |
| Sleeping a lot | Most of the day is typical | Your puppy is hard to wake or weak when awake | How much puppies sleep |
| Shivering in cold | Briefly, then warms up | Weakness, stiffness or confusion | Cold weather limits |
Five checks to do at home
These give you useful information for the vet. Practise while your puppy is healthy, so you know what's normal.
- Gums. They should be pink and moist. Pale, white, blue or very red gums need urgent attention.
- Breathing. Count breaths while your puppy is asleep. Note any visible effort or noise.
- Hydration. Check for sticky gums and sunken eyes. These can be signs of dehydration.
- Food, water and output. Note what went in and what came out, including when, how much and what it looked like. A photo of unusual stool helps.
- Energy. Compare today with your puppy's normal behavior. You know your puppy best.
Why puppies get into trouble quickly
- Small reserves. Small bodies can dehydrate quickly, and toy breeds can develop dangerously low blood sugar if they miss meals.
- Developing immunity. Protection from the mother fades before a puppy's own vaccine protection is complete.
- Exploring with their mouths. Puppies swallow things, so a sudden stomach problem may be a blockage or toxin.
Prevention: the basics that matter most
Vaccines. Follow the puppy vaccination schedule. Parvo is largely preventable, and our guide to parvo shots for puppies explains the timing. Until your vet says the series gives enough protection, avoid places where unknown dogs toilet.
Parasite control. Ask your vet about a plan for worms, fleas, ticks and heartworm that suits your area.
Feeding. Regular meals in the right amounts help with growth and digestion. Use our puppy feeding chart, and change food slowly over 7-10 days.
Food safety. Check our list of foods dogs can and can't eat. Grapes and chocolate are two of the most common dangers, and xylitol, onions and garlic are toxic too.
Puppy-proofing. Keep medications, cleaning products, cords and small objects out of reach. Our new puppy checklist covers setting up your home.
Budgeting. Vet bills are easier to handle when you've planned for them. See how much puppy shots cost and whether pet insurance is worth it for a puppy.
What to tell the vet
Calling with clear details helps the clinic decide how urgently your puppy needs to be seen:
- Your puppy's age, approximate weight and vaccination history
- When the symptom started and how many times it has happened
- Whether your puppy is eating, drinking, peeing and pooping
- Gum color and energy level
- Anything they may have eaten, including the packaging if there is any
If you suspect poisoning, call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 (a fee may apply). Don't try to make your puppy vomit unless a professional tells you to.
What not to do
- Don't give human medications unless your vet says to
- Don't withhold food from a young or toy-breed puppy without veterinary advice
- Don't wait and see if your puppy is unvaccinated and has vomiting or diarrhea
- Don't rely on an online guide, including this one, to rule out something serious
Frequently Asked Questions
How do I know if my puppy is sick or just tired?
A tired puppy wakes easily and is soon bright and playful. A sick puppy stays dull or hard to rouse, may refuse food, and often has other signs such as vomiting, diarrhea, pale gums or a fever. If your puppy seems off and you can’t explain why, call your vet.
When is puppy vomiting an emergency?
Call right away if there is repeated vomiting, blood, a swollen belly, weakness, or your puppy can’t keep water down, or if they are unvaccinated or very young. Small puppies can dehydrate and develop low blood sugar quickly.
What are the most serious illnesses in young puppies?
Parvovirus is one of the most dangerous, especially for unvaccinated puppies. Other concerns include heavy worm burdens, low blood sugar in toy breeds, and swallowed objects or toxins. Fast veterinary care makes a real difference.
Can I give my puppy human medicine?
No, not unless your vet tells you to. Common human painkillers such as ibuprofen, naproxen and acetaminophen can seriously harm dogs, and even a small dose can be dangerous for a puppy.
How often should a puppy see the vet?
Most puppies visit every 3-4 weeks during their vaccine series, usually until about 16 weeks. Your vet will then advise on boosters, parasite prevention and when to spay or neuter.
This guide is general information, not veterinary advice. It hasn't been reviewed by a veterinarian. It's based on published veterinary sources, and it can't diagnose your puppy. If you're worried, contact your vet.
