How to Tell if My Dog Has a Fever (And What to Do About It)

how to tell if my dog has a fever

Amelia Taylor – Cornell University College of Veterinary Medicine


What is a Normal Temperature for Dogs?

  • The normal range for a healthy dog’s body temperature is 101°F to 102.5°F (38.3°C to 39.2°C)
  • Any temperature exceeding 103°F (39.4°C) is regarded as a fever.
  • Temperature exceeding 106°F (41.1°C) are hazardous and may be fatal.

Signs That Your Dog Has Fever

Dogs can not communicate their emotions to us, therefore be aware of these typical signs:

  • A warm nose or ears are frequently the first thing pet owners notice.
  • Lethargy or shivering: Refusing to play or acting abnormally exhausted.
  • Appetite loss: skipping meals or turning down sweets.
  • Watery discharge or red eyes might be signs of an infection or inflammation.
  • Excessive panting, even in the absence of exertion.
  • A disheveled coat or decreased grooming is an indication that they are not feeling well.
  • Coughing or vomiting: Occasionally connected to an illness.

⚠️ Keep in mind that feeling your dog’s head or nose by itself is not a reliable way to detect fever.

How to Take a Precise Temperature Reading of Your Dog

Using a thermometer to take your dog’s temperature is the only accurate method of confirming a fever:

  • For the fastest and most accurate reading, use a digital rectal thermometer designed for dogs.
  • Use a tiny bit of lubrication that is safe for pets, such as petroleum jelly.
  • Carefully place the thermometer into your dog’s rectum, about 1 inch deep.
  • After you hear the buzzer, note the reading.

📌 Advice: Ask your veterinarian about dog-specific ear thermometers if your dog can’t stand this, however they might not be as accurate.

Common Reasons for Fever in Dogs

  • Bacterial, viral, or fungal infections (usually in the urinary tract, lungs, or skin).
  • Vaccinations: It’s common to have a mild fever 24 to 48 hours after receiving a shot.
  • Injuries or inflammation, such as bites, cuts, or tooth infections.
  • Toxins: Consuming dangerous materials such as chemicals, plants, or food.
  • Immune system problems: uncommon but potential underlying disorders.

What You Can Do At Home

If there are no serious symptoms and your dog has a moderate temperature (103–104°F):

  • Offer cold, fresh water and encourage little sips.
  • Provide a nice, peaceful area for them to relax; make sure they’re comfortable.
  • Apply a moist, cold towel to the ears and paws gently.
  • Keep a tight eye on them by taking their temperature every couple of hours.

⚠️ Do NOT give human medications (like Tylenol, Advil, or aspirin) — these can be toxic to dogs.

When to Contact the Vet

  • Consult a veterinarian if the temperature is higher than 104°F or lower than 99°F.
  • The duration of the fever exceeds 24 hours.
  • Your dog exhibits severe symptoms, including vomiting, convulsions, unconsciousness, and refusal to eat or drink.
  • You suspect a major infection or poisoning.