# How to Safely Check Your Dog's Temperature at Home


## Key Takeaways

- A dog's normal rectal temperature ranges from 101.0°F to 102.5°F (38.3°C to 39.2°C); a reading above 103.5°F (39.7°C) indicates a fever, and a temperature of 106°F (41.1°C) or higher is a critical emergency requiring immediate veterinary intervention.
- Rectal digital thermometers are the only reliable method for home temperature measurement in dogs; human ear or forehead scanners are inaccurate due to anatomical differences.
- Immediate emergency veterinary care is paramount for signs such as collapse, difficulty breathing, seizures, uncontrolled bleeding, or suspected poisoning, as these are life-threatening conditions that preclude temperature taking.
- A fever is a symptom of an underlying issue, commonly infections (e.g., respiratory, urinary tract, wound), inflammation, or immune disorders, necessitating veterinary diagnosis to identify the root cause.
- Never administer human medications such as ibuprofen or acetaminophen to dogs, as these are toxic and can cause severe harm or death; only a veterinarian can prescribe appropriate and safe therapeutic agents.
- When contacting a veterinarian, provide precise details including the exact temperature reading, time of measurement, observed clinical signs (e.g., appetite, hydration, breathing rate, gum color), and any potential toxin exposure.

---

If your dog feels warm, acts tired, or has lost interest in food, you may be wondering whether they have a fever. The only reliable way to know is to take their temperature with a thermometer. A dog's normal temperature is higher than a human's, ranging from 101.0°F to 102.5°F (38.3°C to 39.2°C). If your dog's temperature reads above 103.5°F (39.7°C), that is a fever. A reading of 106°F (41.1°C) or higher is dangerous and requires immediate emergency care.

Before you begin, stop and check for emergency signs. If your dog is collapsed, having trouble breathing, seizing, or bleeding uncontrollably, do not stop to take a temperature. Go to an emergency veterinarian right away. The same applies if your dog has eaten something toxic or is straining to urinate without producing urine. These situations are life-threatening, and taking a temperature will only delay care. The American Veterinary Medical Association lists these among emergencies that need immediate professional attention [AVMA Emergency Care for Pets](https://www.avma.org/resources-tools/pet-owners/emergencycare).

## Is This an Emergency?

Use this table to decide your next step. Read each row carefully and match what you see in your dog.


<!-- figure:auto -->
```figure
{
 "type": "triage",
 "title": "Urgency triage by severity of signs",
 "tiers": [
  {
   "tier": "danger",
   "label": "Go to an emergency vet now",
   "signs": [
    "Temperature above 106°F (41.1°C), collapse or inability to stand, difficulty breathing, seizures, uncontrolled bleeding, suspected poisoning, straining to urinate with no urine produced, repeated vomiting, a bloated, tight, or painful abdomen"
   ],
   "action": [
    "Do not wait",
    "Do not try home treatment",
    "Transport your dog to the nearest emergency clinic immediately"
   ]
  },
  {
   "tier": "warn",
   "label": "Book a same-day appointment",
   "signs": [
    "Temperature of 103.5°F to 105.9°F (39.7°C to 41.0°C), lethargy lasting more than 24 hours, refusal to eat for more than 24 hours, vomiting once or twice but otherwise stable, diarrhea without blood, coughing or sneezing, visible discomfort or whining"
   ],
   "action": [
    "Call your regular veterinarian this morning",
    "Describe the temperature reading and all signs",
    "They will tell you whether to come in today or go to emergency care"
   ]
  },
  {
   "tier": "safe",
   "label": "Watch at home for a defined period",
   "signs": [
    "Temperature of 102.6°F to 103.4°F (39.2°C to 39.7°C), mild tiredness after exercise or a hot day, normal appetite and drinking, normal gum color (pink and moist), no vomiting or diarrhea"
   ],
   "action": [
    "Recheck the temperature every 4 to 6 hours",
    "If the temperature rises above 103.5°F, or if any new sign appears, move up to a same-day appointment or emergency care"
   ]
  }
 ]
}
```

| Urgency Level | Signs You May See | What To Do |
|---|---|---|
| Go to an emergency vet now | Temperature above 106°F (41.1°C), collapse or inability to stand, difficulty breathing, seizures, uncontrolled bleeding, suspected poisoning, straining to urinate with no urine produced, repeated vomiting, a bloated, tight, or painful abdomen | Do not wait. Do not try home treatment. Transport your dog to the nearest emergency clinic immediately. |
| Book a same-day appointment | Temperature of 103.5°F to 105.9°F (39.7°C to 41.0°C), lethargy lasting more than 24 hours, refusal to eat for more than 24 hours, vomiting once or twice but otherwise stable, diarrhea without blood, coughing or sneezing, visible discomfort or whining | Call your regular veterinarian this morning. Describe the temperature reading and all signs. They will tell you whether to come in today or go to emergency care. |
| Watch at home for a defined period | Temperature of 102.6°F to 103.4°F (39.2°C to 39.7°C), mild tiredness after exercise or a hot day, normal appetite and drinking, normal gum color (pink and moist), no vomiting or diarrhea | Recheck the temperature every 4 to 6 hours. If the temperature rises above 103.5°F, or if any new sign appears, move up to a same-day appointment or emergency care. |

If you are unsure which category fits, call your veterinarian. Describe the temperature reading and the signs you observe. They can help you decide. Do not give your dog any human medication for fever. Many human pain relievers, including ibuprofen and acetaminophen, are toxic to dogs. Only a veterinarian can determine a safe medication and dose, and that decision requires an examination [MSD Veterinary Manual Pet Owner Version](https://www.msdvetmanual.com/pet-owners).

## What a Fever Means

A fever is a rise in body temperature that signals the immune system is fighting something. The most common causes in dogs are infections, such as a respiratory infection, a urinary tract infection, or an infected wound. Other causes include inflammation, immune system disorders, and in rare cases tumors. A fever is a sign, not a disease itself. It tells you that something is wrong, but it does not tell you what that something is.

Your dog cannot tell you where it hurts. A fever often comes with other signs. Watch for reduced energy, shivering, a warm nose or ears, loss of appetite, and drinking less water than usual. Some dogs with a fever hide or seek out cool surfaces to lie on. These signs together point toward illness, but only a veterinarian can identify the underlying cause through a physical exam and possibly blood tests or imaging [MSD Veterinary Manual Pet Owner Version](https://www.msdvetmanual.com/pet-owners).

## How to Take a Rectal Temperature

A rectal thermometer is the only accurate method for a dog. Ear thermometers made for humans are unreliable in dogs because of the shape of the ear canal. Infrared forehead scanners are not accurate for dogs either. You will need a digital rectal thermometer, petroleum jelly or a water-based lubricant, and a second person to help hold your dog still.

Have your helper stand on one side of your dog and gently hold the chest or place an arm under the belly. A small dog can be held on a lap. A large dog should stand on the floor. Do not restrain your dog tightly. A calm, steady hold is safer for both of you. If your dog becomes distressed, stop and call your veterinarian for guidance.

Lubricate the tip of the thermometer with petroleum jelly. Lift your dog's tail gently to one side. Insert the thermometer about one inch into the rectum, angling it slightly to follow the natural curve of the body. Hold it in place until it beeps, which usually takes 30 to 60 seconds. Remove it slowly and read the display. Clean the thermometer with soap and warm water or rubbing alcohol before storing it.

If your dog resists, do not force the thermometer. A struggling dog can injure themselves or you. Stop, and consider whether the temperature reading is essential right now. If your dog is stable and not showing emergency signs, you can call your veterinarian for advice. They may suggest bringing the dog in for a professional reading.

## What Else Could Be Going On

A warm dog is not always a feverish dog. Dogs can feel warm after exercise, on a hot day, or when they have been lying in the sun. Their normal temperature runs higher than yours, so a dog that feels warm to your touch may still be within a healthy range. That is why a thermometer matters.

A low temperature is also a concern. If your dog's temperature reads below 99°F (37.2°C), that is hypothermia, a dangerously low body temperature. This can happen after prolonged exposure to cold, or it can signal a severe underlying illness. A low temperature with weakness or collapse is an emergency. Seek immediate veterinary care.

Other conditions can mimic a fever. Pain from an injury, anxiety, or a recent vaccination can cause a mild temperature elevation. These usually resolve on their own. But if the temperature stays elevated or other signs appear, do not assume it is harmless. The American Animal Hospital Association recommends regular veterinary checkups to catch health problems early, and a fever is a clear reason to schedule a visit [AAHA Pet Owner Resources](https://www.aaha.org/for-pet-parents/).

## When to Call Your Veterinarian

Call your veterinarian if the temperature is 103.5°F or higher, if the fever lasts more than 24 hours, or if your dog shows any sign in the emergency column of the table above. Describe what you observed and when it started. Mention the exact temperature reading and whether your dog has eaten, drunk, urinated, or defecated normally in the past 12 hours.

Do not wait to see if a fever resolves on its own. A fever can indicate a serious infection that needs treatment. Your veterinarian may want to run blood tests to find the cause. Treatment depends entirely on the diagnosis. Never attempt to lower your dog's temperature with cold water, ice, or human medication. These actions can cause shock or poisoning. Leave treatment decisions to the veterinarian who has examined your dog [AVMA Pet Owner Resources](https://www.avma.org/resources-tools/pet-owners).

## What You Can Safely Do at Home Right Now

If your dog has a mild fever and is otherwise stable, you can take a few careful steps at home while you decide whether to call your veterinarian. Keep your dog in a cool, quiet room with fresh water available. Do not force your dog to drink. Offer small amounts of water every 15 to 30 minutes if your dog is alert and interested.

You can gently wipe your dog's ears, paw pads, and belly with a cool, damp cloth. Do not use ice, cold water, or rubbing alcohol. These can cause shivering, which actually raises body temperature, and they can make your dog uncomfortable or frightened. Do not give your dog any human fever medication. Drugs like ibuprofen, acetaminophen, and aspirin can be toxic to dogs and can cause serious harm or death. Only a veterinarian can decide whether any medication is needed and what dose is safe.

Watch your dog closely. A mild fever often resolves on its own within 24 hours, but you cannot know the cause without a veterinarian's help. If your dog's temperature rises above 103.5°F (39.7°C), if the fever lasts more than 24 hours, or if any new signs appear, call your veterinarian. If your dog collapses, has trouble breathing, has a seizure, or cannot stand, this is an emergency. Do not wait. Seek in-person emergency care immediately. The American Veterinary Medical Association lists collapse, difficulty breathing, and seizures as signs that require urgent professional care.

## What to Write Down Before You Call

Before you phone your veterinarian, gather a few specific pieces of information. This helps the vet team understand your dog's situation and decide how quickly you need to be seen.

Write down your dog's temperature reading and the time you took it. Note whether you took it rectally or with an ear thermometer, because ear readings can be less accurate. Record your dog's age, breed, and any known health conditions. List any medications or supplements your dog takes regularly.

Describe what you have observed. Count your dog's breathing rate at rest for one full minute. A normal resting rate for most dogs is between 10 and 30 breaths per minute, though this varies with size and breed. Check your dog's gum color. Healthy gums are pink and moist. Pale, white, blue, or brick-red gums are concerning. Press gently on your dog's gums with your fingertip, release, and count how many seconds it takes for the color to return. It should return within two seconds.

Note how many times your dog has vomited or had diarrhea in the past 12 hours, and roughly how much. Note whether your dog is eating and drinking normally. Note whether your dog seems painful, for example by whimpering, flinching when touched, or refusing to move. Write down anything your dog may have eaten that was not normal food, including plants, human medication, or household chemicals. If you suspect poisoning, contact the ASPCA Animal Poison Control Center or your veterinarian immediately.

## Decision Guide: What Your Temperature Reading Means

Use this table as a general guide. It does not replace a veterinarian's judgment.

| Rectal Temperature | What It Means | What to Do |
| --- | --- | --- |
| Below 99°F (37.2°C) | Dangerously low. This can indicate shock, hypothermia, or a serious illness. | Call your veterinarian now. If your dog is collapsing, weak, or unresponsive, go to an emergency clinic immediately. |
| 99°F to 102.5°F (37.2°C to 39.2°C) | Normal range for most dogs. | No fever. If your dog is acting sick, other causes are possible. Call your vet for advice. |
| 102.6°F to 103.5°F (39.3°C to 39.7°C) | Mildly elevated. | Monitor closely. Recheck the temperature in 2 to 4 hours. Call your vet if it rises or if other signs appear. |
| Above 103.5°F (39.7°C) | Fever that warrants attention. | Call your veterinarian today. They will advise whether your dog needs to be seen. |
| Above 105°F (40.6°C) | High fever. This can be dangerous and may indicate a serious infection, heat stroke, or toxin exposure. | Call your veterinarian immediately. Seek emergency care if your dog is lethargic, vomiting, or distressed. |

## What a Veterinary Visit Usually Involves

When you bring your dog in, the veterinarian will start by asking about your dog's history and the signs you have noticed. They will ask when the fever started, whether your dog has been eating and drinking, whether there has been vomiting or diarrhea, and whether your dog could have eaten anything unusual. They will also ask about recent vaccinations, travel, and contact with other animals.

The veterinarian will perform a physical examination. They will take your dog's temperature, listen to the heart and lungs, feel the abdomen, check the ears and mouth, and look at the skin and lymph nodes. These steps help narrow down the cause of the fever.

Depending on what they find, the veterinarian may recommend tests. Common tests include blood work to check for infection or organ problems, a urine sample, and sometimes imaging such as X-rays or ultrasound. If your dog has diarrhea or vomiting, a fecal test may be checked for parasites. The exact tests depend on your dog's signs and examination findings.

The cost of a visit varies widely by region and clinic. A basic office visit with an examination typically ranges from $50 to $150. Blood work often adds $100 to $300. Imaging can add several hundred dollars. These are general ranges only, not quotes. Prices vary widely by region and clinic, and emergency or after-hours care costs more. Ask your clinic for an estimate before tests are run if cost is a concern.

## When an Online Vet Can Help, and When It Cannot

Any situation in this article that involves a temperature above 105°F, collapse, difficulty breathing, seizures, suspected poisoning, or a dog that cannot stand requires hands-on care. Do not use a remote consultation for these. Go to an emergency clinic now. The same applies if your dog has a fever and is also vomiting repeatedly, has bloody diarrhea, or seems to be in severe pain. These signs can indicate life-threatening problems that cannot be assessed over video.

A remote consultation is genuinely useful for early or mild presentations. If your dog has a slightly elevated temperature and no other signs, an online veterinarian can help you decide whether a visit is needed. They can also help with a recheck on a known problem, a question about whether a sign warrants a visit, a medication side effect question, or a follow-up on a chronic condition.

A remote veterinarian can take a detailed history, look at visible signs on video, and advise you on next steps. In many states they can prescribe medication, but prescribing rules differ by state, and a veterinarian may require an in-person examination first. What a remote consultation cannot do is palpate the abdomen, listen to the chest, take a temperature, run bloodwork, or image anything. If your dog needs any of these, you will need to visit a clinic in person.

## Common Mistakes Owners Make

Taking a temperature sounds simple, but small errors can produce a reading that misleads you or your veterinarian.

**Mistake: Using a glass mercury thermometer.** These can break inside your dog, which is dangerous. Use a digital rectal thermometer made for pets or a flexible digital thermometer for human babies. It reads faster and is safer.

**Mistake: Taking the temperature right after exercise or excitement.** A dog that has just run, played, or ridden in a car can show a falsely high reading. Wait until your dog has been resting quietly for at least 15 to 20 minutes.

**Mistake: Guessing by touch.** A warm nose or warm ears does not tell you anything reliable. The only accurate way to measure a dog's temperature is rectally. Ear and armpit readings in dogs are not dependable.

**Mistake: Stopping at one reading.** One high number can be a fluke from stress or a wriggling dog. If your dog seems unwell, take the temperature twice, about 30 minutes apart, and record both.

**Mistake: Treating a fever yourself.** Never give your dog human pain relievers or fever reducers. Many human medications are toxic to dogs. Only a veterinarian can choose a safe medication and the correct dose, which depends on your dog's weight, age, and health condition.

| Common Mistake | What to Do Instead |
| --- | --- |
| Using a glass thermometer | Use a digital rectal thermometer |
| Measuring after exercise | Wait 15 to 20 minutes of rest |
| Judging fever by nose or ears | Measure rectally only |
| Relying on one reading | Take two readings 30 minutes apart |
| Giving human fever medication | Call your veterinarian for guidance |

## How to Reduce the Chance of It Happening Again

You cannot always prevent a fever, because infections and inflammation can arise without warning. But you can lower the odds of common causes.

Keep your dog's vaccinations current. Routine vaccines protect against several illnesses that cause fever, such as distemper and parvovirus. Your veterinarian can tell you which vaccines your dog needs based on age, lifestyle, and local risks. The American Animal Hospital Association offers guidance on preventive care schedules for every life stage.

Prevent access to toxins. Many household items can cause fever and serious illness if eaten, including chocolate, grapes, xylitol gum, certain plants, and rodent poisons. The ASPCA Animal Poison Control Center lists common hazards and explains what to do if exposure happens. Store these items out of reach and supervise your dog outdoors.

Keep your dog away from sick animals. Fevers can spread between dogs through coughing, sneezing, or shared water bowls. Avoid dog parks and boarding facilities if you know an outbreak is occurring in your area.

Check your dog for ticks after walks. Tick-borne diseases can cause fever and may take weeks to appear. If you find a tick, remove it carefully and tell your veterinarian.

## What Recovery and Ongoing Management Usually Look Like

Recovery depends entirely on the cause. A mild infection may resolve within a few days of treatment. A more serious condition, such as pneumonia or a tick-borne illness, can take several weeks.

Your veterinarian will give you a treatment plan. Follow it exactly. Give all medications for the full prescribed course, even if your dog seems better. Stopping early can allow the infection to return, sometimes stronger.

During recovery, expect your dog to be quieter than usual. Offer fresh water often. Feed small, bland meals if your dog has an appetite, but do not force food. Let your dog rest in a calm, comfortable spot. Keep other pets away so your dog can recover without stress.

You will likely need a follow-up visit. The veterinarian may repeat blood tests or other checks to confirm the fever is gone and the underlying problem is resolving. Ask at the first visit when you should schedule that recheck.

Most dogs with a simple fever from a minor infection improve within 24 to 48 hours of starting treatment. If your dog does not improve, or if the fever returns after stopping medication, call your veterinarian again. Do not wait several days to make that call.

## Frequently Asked Questions

**Can I use a human ear thermometer on my dog?**

Ear thermometers made for humans are not accurate in dogs. The dog's ear canal has a different shape and angle, so the probe does not sit where it needs to. A rectal digital thermometer is the only reliable option at home. If you cannot take a rectal temperature safely, do not guess. Call your veterinarian and describe your dog's other signs, such as appetite, energy, and breathing.

**My dog's temperature is 103.5°F. Should I go to the emergency room?**

A temperature of 103.5°F is above normal but not automatically an emergency. Normal is roughly 101°F to 102.5°F. Call your regular veterinarian first. They can ask about other signs and decide if your dog needs to be seen today. Go to an emergency clinic immediately if your dog is collapsing, struggling to breathe, having seizures, or bleeding uncontrollably. The American Veterinary Medical Association lists signs that require urgent care.

**How do I keep my dog still during the temperature check?**

Have a second person hold your dog's chest and front legs while you handle the tail and thermometer. Speak in a calm, low voice. Give small treats before and after. If your dog squirms, stops, and try again in 10 minutes. Never pin your dog down or force the thermometer. A struggling dog can injure itself or you.

**What if my dog has diarrhea and I need to take a temperature?**

Diarrhea can make a rectal reading messy and harder to interpret. Wipe the area gently first. Use a fresh thermometer cover and lubricate well. Insert only about one inch. If the diarrhea is severe, contains blood, or your dog is also vomiting, skip the temperature and call your veterinarian. Those signs can point to a serious condition that needs prompt attention.

**Can stress cause a fever in dogs?**

Yes, but only a mild one. A stressed or anxious dog may show a reading slightly above normal, usually under 103°F. That is why you should let your dog rest before measuring. If the reading stays high after rest, or if your dog also has poor appetite, lethargy, vomiting, or diarrhea, do not assume stress is the cause. Have your veterinarian examine your dog to rule out infection or other illness.

**How long should I wait before calling the vet after a high reading?**

Call right away. Do not wait to see if the fever goes down on its own. A fever is a sign that something is wrong, and the cause may need treatment. Describe the temperature, how long it has been high, and any other signs you have noticed. Your veterinarian can tell you whether to come in immediately or monitor for a short period. The MSD Veterinary Manual provides background on fever in dogs to help you understand what the reading means.

## Related Clinical & Scientific Guides

* [Dog Coughing: When Is It an Emergency?](/knowledge/veterinary-medicine/vet-visit-decisions/dog-coughing-when-emergency)
* [My Dog Ate a CBD Gummy: What Should I Do?](/knowledge/veterinary-medicine/vet-visit-decisions/dog-ate-cbd-gummy)
* [Cat Vomiting After Eating Too Fast: When to Slow Down and When to Call](/knowledge/veterinary-medicine/vet-visit-decisions/cat-vomiting-after-eating-too-fast)


## References and Further Reading

- [AVMA Emergency Care for Pets](https://www.avma.org/resources-tools/pet-owners/emergencycare)
- [ASPCA Animal Poison Control Center](https://www.aspca.org/pet-care/animal-poison-control)
- [AVMA Pet Owner Resources](https://www.avma.org/resources-tools/pet-owners)
- [MSD Veterinary Manual Pet Owner Version](https://www.msdvetmanual.com/pet-owners)
- [AAHA Pet Owner Resources](https://www.aaha.org/for-pet-parents/)

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> This article is general educational information for pet owners. It is not a substitute for veterinary diagnosis, examination, or treatment. If your pet is showing severe or rapidly worsening signs, contact an emergency veterinary hospital immediately.