Fever in Dogs

Certain circumstances can lead your dog to feel warmer than they usually would. But how do you know if they are too warm? Here, our vets in Nashua talk about what a normal temperature is in dogs, how to tell that your dog has a fever, and when you should seek veterinary care. 

How hot is too hot?

When your dog feels healthy their body temperature will sit naturally between 101° to 102.5° Fahrenheit, which is significantly higher than humans whose body temperature ranges from 97.6° to 99.6° F.

A temperature of more than 103° F is considered a dog fever. A high fever in dogs is a temperature of 106° F or higher which could result in serious and fatal complications.

How can you accurately take your dog's temperature?

Unfortunately, determining if your dog has a fever isn't as straightforward as it may seem. Their body temperature can fluctuate depending on their level of excitement and activity.  Did you know that their internal temperature also changes depending on the time of day? Therefore, it is important to understand your dog’s healthy temperature. You can determine this by noting your dog's temperature at various times of the day, for several days.

While many people are under the understanding that a dog's nose is key to determining whether or not your dog has a fever, this is not an accurate indicator that your dog has a fever.

A rectal thermometer is the only surefire way to tell if your dog is warmer than they should be. Some pet stores carry thermometers made just for pets. It is recommended that you keep a separate thermometer just for your dog and store it where you keep your dog’s supplies.

Start by lubricating the tip of the thermometer with petroleum or water-soluble lubricant. Then lift your dog’s tail up and to the side and carefully insert the thermometer about 1 inch into your dog’s rectum. If possible, have a second person assist you by holding under the dog’s hind legs to prevent your dog from sitting. Once the thermometer temperature has registered you can carefully remove the thermometer.

What are some of the causes of fever?

This is not an exhaustive list of reasons why a dog may develop a fever, but some of the most common reasons include:

Sometimes you will just not be able to determine the cause of the fever. This is often referred to as a fever of unknown origin or FUO. In these cases, a fever could be caused by underlying disorders of the immune system, bone marrow problems, or cancer.

What symptoms indicate a fever in dogs?

Chances are that you will notice unusual behavior before you notice a change in your dog's temperature. You should keep a careful eye on your dog and take note of your dog's symptoms. Any combination of the following symptoms is a good indication that you should check your dog’s temperature.

The typical symptoms of fever in dogs include:

How to Reduce Fevers in Dogs

If your dog’s fever is 106° F or higher, immediately take your dog to a local veterinary emergency clinic.

If your dog has a fever, of 103° F or more, you can help to cool your dog’s body temperature by applying cool water with a soaked towel or cloth to your dog's ears and paws and running a fan near your dog. Stop applying the water when your dog’s temperature drops below 103° F. Continue to monitor your dog closely to ensure that the fever doesn’t return.

Try to coax your dog to drink small amounts of water to stay hydrated, but don’t force your dog to drink.

It is important to never give your dog human medications, such as acetaminophen or ibuprofen. These medications can be poisonous to your dog and cause serious injury or death.

If your dog exhibits any other symptoms, such as shivering, panting, and vomiting you should consider taking your dog to the veterinarian for urgent care.

Note: The advice provided in this post is intended for informational purposes and does not constitute medical advice regarding people or pets. Always follow your doctor's advice regarding asthma or other allergy symptoms.