Can Dogs Get Fevers?

Just like humans, dogs can get fevers. Veterinary professionals typically define fevers in dogs as rectal temperatures of 102.5 degrees Fahrenheit /39.2 degrees Celsius or greater. If you suspect your pup is feverish, take them to the vet for supportive care, like hydration and medications.

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What causes fevers in dogs?

A dog’s normal temperature is between 100 degrees Fahrenheit and 102.5 degrees Fahrenheit (37.7 degrees Celsius to 39.4 degrees Celsius). A pup is considered febrile — aka having a fever — when their temperature is above 102.5 degrees Fahrenheit. A fever develops as a result of the brain telling the body to turn the body’s internal thermostat up. So, what triggers this response? 

When a dog’s immune system reacts to something, substances called pyrogens trigger the brain to make the body'’s temperature go up. These pyrogens can come from white blood cells within the body or from foreign organisms, like bacteria. A fever helps the immune system in two major ways: It stimulates immune cells and harms infectious cells. Fevers are helpful, but they’re only helpful to a certain point. Fevers above 106 degrees Fahrenheit can introduce a new set of problems. 

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Dogs can develop fevers for a number of reasons, including: 

• Infection (bacterial, viral, or fungal)

• Inflammation

• Parasites

• Exaggerated immune response

• Cancer

• Fever of unknown origin (sometimes, the cause of a fever is not so obvious)

Fever versus hyperthermia

Hyperthermia is an abnormally high body temperature. Dogs develop fevers from internal causes, like the body’s response to a viral infection. They develop hyperthermia from external reasons, like going on a long run on the first hot day of the year. Pro tip: Don’t do this.

Ease back into high levels of outdoor activity when the weather warms up. While doggie fevers can get pretty high (like 105 degrees Fahrenheit), dogs with hyperthermia can get extremely hot (like 107 degrees Fahrenheit and higher — yikes!)

Recognizing dog fever symptoms

Dog parents concerned that their pup has a fever may think, “My dog feels hot to the touch” or “My dog’s nose is warm and dry.” The truth is that these are not good ways to determine a pup’s temperature. The only sure-fire way to know if a dog has a fever is to actually measure their body temperature.

Symptoms of fever in dogs may include: 

• Poor appetite

• Lethargy

• Shivering

• Excessive panting

• Stiffness/reluctance to move

How to take a dog’s temperature

The only true way to know if your dog has a fever is to take their temperature. The best way to do this is by taking a rectal temperature with a digital thermometer. Depending on your dog’s opinions on the matter, this may not be the easiest way if you’re flying solo. 

Another option is to use a veterinary-specific ear thermometer. Studies have shown that ear temperatures can be less accurate than rectal temperatures, but they can be good for monitoring trends (like if your dog’s temperature goes up or down from the last reading). There are also non-contact, infrared thermometers, but studies have shown that these often don’t give reliable results. 

So, we’re left with taking butt temperatures. Here’s how to get one:

• Gather supplies: You’ll need a digital thermometer and a water-based lubricant or petroleum jelly for lubricating the thermometer tip. You should keep this thermometer separate from the one you and your family use, for (hopefully) obvious reasons. 

• Grab a buddy (optional): A helping hand can make things easier, especially if your pup gets a little bit squirmy.

• Provide a calm environment: Make sure your dog is relaxed. Excitement and activity can temporarily increase their temperature, making it seem like they have a fever when they really don’t. 

• Use a little lube: Place a small amount of lubricant on the tip of the thermometer. 

• Insert the thermometer: Lift your dog’s tail and gently insert the thermometer into the rectum about one to two inches. Hold the thermometer in place and wait for the beep (or whatever indication that the thermometer is done taking a measurement). 

• Keep it clean: Remove the thermometer and wipe it clean. 

• Reward your dog: Provide treats and snuggles for positive reinforcement.

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How to comfort a dog with a fever

Dog fever treatment depends on the cause of the elevated temperature and should be guided by your veterinarian, but pup parents can still provide some comfort for their pups at home. 

Provide cool places to sleep

Just like people, febrile dogs may seek warmth one minute and cold the next. Provide them with a cozy bed to snuggle up in and also a cool surface (and maybe a fan) where they can try to cool down. 

Provide plenty of fresh water

Any issue that can cause a dog to have a fever can also make them not want to eat and drink as much. Make sure your pup has plenty of fresh water at all times. Try to encourage them to drink, but don’t force the issue. 

Seek (and follow) your vet’s advice

As soon as you know your dog has a fever, the first call should be to your vet’s office. It may take some testing to determine the cause of your dog’s fever. They may need antibiotics, anti-inflammatories, or more aggressive care. Once a treatment plan is in place, be sure to follow it. 

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Dog fever medications

Hopefully the article will help you remember what a pup’s temperature should be and how to take it. But above all else, you should remember this: Never use human medications if your dog has a fever. Human medications, like ibuprofen and acetaminophen, can be toxic to dogs and cause more harm than good. In some cases, giving over-the-counter medications can make it harder for your vet to prescribe what your dog actually needs due to medication interactions.

If you’re wondering, “What can I give my dog for a fever at home?”, here’s what you can give them:

• A fresh bowl of water

• A cool place to rest

• Lots of love

• A promise to call a veterinarian ASAP

When to visit a vet for a fever

If your dog has a fever between 102.5 degrees Fahrenheit and 104 degrees Fahrenheit, call your vet’s office to get some advice. They’ll be able to tell you if your dog can wait for an appointment or should be seen right away based on their symptoms. Head to the vet if they have a fever above 104 degrees Fahrenheit. If they have a fever above 105 degrees Fahrenheit, get to the vet, stat. 

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FAQs (People also ask):

What should a dog’s temperature be? 

Normal temperature for a dog is between 100 degrees Fahrenheit to 102.5 degrees Fahrenheit (37.7 degrees Celsius to 39.4 degrees Celsius). This can fluctuate throughout the day depending on size, breed, and activity level. A dog’s temperature is elevated when it’s above 102.5 degrees Fahrenheit.

Does kennel cough cause fever? 

Kennel cough, also called canine infectious respiratory disease complex (CIRDC), is a contagious respiratory infection that can be caused by both bacterial and viral pathogens. Dogs with kennel cough often have low grade fevers. 

How do I take a dog’s temperature at home? 

Dog parents can take their dog’s temperature at home by gently inserting a lubricated digital thermometer into their dog’s rectum. Be sure to keep your pup’s thermometer separate from your own. 

References:

• Pyrexia in Juvenile Dogs: a Review of 140 Referred Cases

• Let Fever Do Its Job

• Comparison Between Auricular and Standard Rectal Thermometers for the Measurement of Body Temperature in Dogs

• A Noninvasive Method of Temperature Measurement Using a Noncontact Handheld Infrared Thermometer Fails to Correlate With Rectal Temperature in Dogs and Cats