How to Take Your Dog’s Temperature at Home

Knowing how to check your dog’s temperature at home is one of the most valuable skills you can have as a pet owner. Whether your dog seems lethargic, is refusing food, or just doesn’t seem like themselves, taking their temperature can give you an important piece of the puzzle before you call your vet. This simple skill can help you act quickly when it matters most.

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Common Causes

Before reaching for the thermometer, it helps to understand why your dog’s temperature might be elevated or lower than normal in the first place. A dog’s body temperature can shift for a variety of reasons, some minor and some requiring prompt veterinary attention.

• Infection or illness: Bacterial, viral, or fungal infections are among the most common causes of fever in dogs. Conditions like parvovirus, kennel cough, or a urinary tract infection can all drive your dog’s temperature up.
• Inflammation or injury: Internal inflammation, abscesses, or a localized wound that has become infected can trigger a fever response as your dog’s immune system works to fight off the problem.
• Toxin ingestion: If your dog has ingested something toxic, their body temperature may rise rapidly as part of the systemic response.
• Vaccination reactions: It is completely normal for some dogs to develop a mild, temporary fever within 24 to 48 hours of receiving a vaccine. This typically resolves on its own.
• Heatstroke: On the opposite end of the spectrum, prolonged exposure to high temperatures can cause your dog’s body temperature to spike to dangerous levels, which is a medical emergency.

Infections are typically diagnosed through a combination of physical examination, bloodwork, and urinalysis. A complete blood count can reveal elevated white blood cells, which signals your vet that the immune system is actively fighting something. In cases of suspected fungal infection or tick-borne illness — both of which are underdiagnosed causes of persistent fever — additional testing like serology or PCR panels may be recommended. If your dog’s fever keeps returning after treatment, further diagnostics are almost always warranted.

Age plays a meaningful role in how dogs respond to temperature changes. Puppies and senior dogs are far more vulnerable to the effects of fever and hypothermia alike. A young puppy’s immune system is still maturing, making infections like parvovirus especially dangerous and fast-moving. Older dogs, on the other hand, may have underlying conditions — kidney disease, heart disease, or cancer — that make even a modest fever more complicated to manage. If your dog is very young or in their senior years, a lower threshold for calling your vet is always wise.

Seasonality matters too. Tick-borne diseases such as Lyme disease, anaplasmosis, and ehrlichiosis spike during warmer months when tick activity is highest, and all of them can cause fever as a primary symptom. Heatstroke, naturally, becomes a more pressing concern in summer. Conversely, hypothermia is more common in winter months, particularly in small breeds or dogs left outside in cold, wet conditions without adequate shelter.

Understanding the potential cause behind an abnormal temperature reading helps you communicate more effectively with your veterinarian and respond appropriately.

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Symptoms to Watch For

Your dog’s temperature reading never exists in isolation. It is always most useful when paired with the other symptoms you are observing. Before and after taking your dog’s temperature, take note of any of the following signs:

• Lethargy or unusual fatigue
• Loss of appetite or refusal to drink water
• Shivering or trembling, even in a warm environment
• Warm, dry nose or flushed ears
• Vomiting or diarrhea
• Rapid, shallow breathing
• Glassy or red eyes
• Nasal discharge

A normal dog temperature falls between 101°F and 102.5°F (38.3°C to 39.2°C). A temperature above 103°F is considered a fever, and anything above 104°F warrants an urgent call to your veterinarian. On the lower end, a temperature below 99°F can indicate hypothermia or shock, which is equally serious.

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Symptom Severity at a Glance

Symptom	Risk Level	Action Required
Mild lethargy with normal temperature	Mild	Monitor at home for 24 hours
Fever between 103°F and 103.9°F	Moderate	Call your vet within 24 hours
Fever at or above 104°F	Serious	Call your vet immediately
Temperature below 99°F with shivering	Serious	Seek emergency care immediately
Vomiting or diarrhea alongside fever	Moderate	Call your vet within 12–24 hours
Rapid, shallow breathing with high temperature	Serious	Seek emergency care immediately
Mild nasal discharge, eating and drinking normally	Mild	Monitor closely; call vet if worsening

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Breeds Most at Risk

While any dog can develop a fever or suffer from temperature dysregulation, certain breeds are worth watching more closely due to their anatomy or genetic predispositions.

Brachycephalic breeds — including Bulldogs, French Bulldogs, and Pugs — are at significantly elevated risk for heatstroke and temperature-related emergencies. Their shortened airways make it physically harder to pant efficiently, and panting is a dog’s primary mechanism for releasing excess body heat. Even moderate outdoor temperatures can push these dogs into dangerous territory faster than you might expect.

Siberian Huskies and Alaskan Malamutes are bred for cold climates and can struggle in warm environments, making heat-related fever and heatstroke a genuine concern during summer months. Their dense double coats, while protective in the cold, trap heat in warmer weather and make it difficult for them to cool down at the same rate as other breeds.

Greyhounds and other sighthounds have very low body fat and a unique physiology that affects how they metabolize certain medications and respond to anesthesia — but it also means they are more vulnerable to hypothermia. If a Greyhound presents with a low temperature reading, it warrants prompt attention even if the drop seems modest.

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What You Can Do at Home

Taking your dog’s temperature at home is straightforward once you know the correct technique. Here is everything you need to do it safely and accurately.

What you will need:

• A digital rectal thermometer (never a glass thermometer)
• Petroleum jelly or a water-based lubricant
• A helper, if possible
• Treats for positive reinforcement

Step-by-step instructions:

1. Prepare your thermometer. Use a digital thermometer designated specifically for your pet. Clean it with rubbing alcohol before and after each use, and apply a generous amount of lubricant to the tip.

2. Get your dog into position. Have your dog stand calmly, or gently lay them on their side. If your dog is anxious or wiggly, having a second person hold them still and offer reassurance makes the process much smoother.

3. Insert the thermometer carefully. Gently lift your dog’s tail and slowly insert the thermometer approximately one inch into the rectum. Never force it. Speak to your dog in a calm, soothing voice throughout.

4. Wait for the reading. Most digital thermometers will beep within 60 seconds. Keep the thermometer steady until you hear the signal, then carefully remove it.

5. Record and clean. Note the reading, clean the thermometer thoroughly with rubbing alcohol, and reward your dog with a treat and plenty of praise.

If your dog is extremely resistant or the process causes them distress, do not push through it. In-ear thermometers designed for pets are available as an alternative, though rectal readings are considered the most accurate.

It is also worth mentioning what not to do. Never use a forehead strip thermometer or rely solely on touching your dog’s nose to assess their temperature. These methods are not medically reliable and can lead to false reassurance when your dog genuinely needs help.

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When to See a Vet

While taking your dog’s temperature at home is a helpful first step, there are situations where a vet visit should not be delayed.

Contact your veterinarian promptly if your dog’s temperature is above 103°F or below 99°F, especially if it is accompanied by other symptoms such as vomiting, difficulty breathing, seizures, extreme weakness, or signs of pain. A fever above 104°F is a veterinary emergency, and a temperature of 106°F or higher can cause organ damage and become life-threatening within a very short time.

Similarly, if your dog has a low temperature and is shaking, unresponsive, or pale around the gums, head to an emergency animal hospital immediately. Hypothermia and shock can deteriorate quickly, and time is critical.

Even if the temperature reading appears only mildly elevated, trust your instincts as a pet owner. You know your dog better than anyone, and if something feels off beyond just the numbers, a call to your vet is always the right move.

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How Pet Insurance Can Help

Unexpected vet visits — especially emergency ones — can come with costs that catch even the most prepared pet owners off guard. Having a pet insurance plan in place means you can focus entirely on getting your dog the care they need rather than worrying about the bill.

Protective Care: Get a free pet insurance quote and protect your dog today

For times when you need immediate guidance from a licensed veterinarian without leaving home, telehealth services can be a lifesaver.

For more clinical details on canine health, you can refer to the professional guidelines from the Merck Veterinary Manual.

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Taking your dog’s temperature at home is a simple but genuinely powerful tool in your pet care toolkit. The more comfortable you become with the process, the more confidence you will have during those moments when your dog is not feeling their best. You are already doing the right thing by learning how to advocate for your dog’s health — and that kind of attentiveness makes all the difference.