A puppy with a fever may seem tired, less interested in food, or more uncomfortable than usual. Fevers can happen with infections, inflammation, or other health issues, so it is important to notice the signs early. Checking your puppy's temperature is one of the most direct ways to assess whether something may be wrong.
Most puppies have a normal body temperature between about 100.5°F and 102.5°F. Some mild variation can happen depending on the puppy's age, stress level, and the time of day. A temperature above the usual range may indicate a fever, but it should be interpreted alongside behavior and overall health.
Because puppies are small and can get sick quickly, even a mild fever can be worth taking seriously. If your puppy seems off, low energy, or not eating well, a temperature check can help you decide whether veterinary advice is needed.
The most accurate way to check a puppy's temperature is with a digital rectal thermometer. Use a pet-safe thermometer, lubricate it with petroleum jelly or water-based lubricant, and gently insert it into the rectum only a short distance. Keep your puppy calm during the process and stop if the puppy seems distressed.
If you are not comfortable taking a rectal temperature, a veterinarian can do it quickly and safely. A quick visit can also help rule out other causes of illness.
A puppy may have a fever if you notice one or more of the following:
These signs do not always mean a fever, but they can point to illness and should be taken seriously, especially in very young puppies.
Contact a veterinarian if your puppy's temperature is elevated, if the puppy is acting unusually tired, or if other symptoms are present. A fever in a puppy can be caused by infection or other health problems, and pups can decline quickly if the issue is not addressed promptly.
Seek veterinary care sooner if the puppy is very young, seems weak, refuses to drink, has repeated vomiting, or has trouble breathing. These symptoms require urgent attention.
If your puppy seems sick, keep them comfortable and offer water if they will drink. Avoid giving human medications unless a veterinarian specifically recommends them. Many pet medications can be unsafe for puppies, so it is best not to guess.
Keep the puppy in a quiet, comfortable area and monitor their breathing, appetite, and energy level. A short note about symptoms can help the veterinarian assess the situation faster.