Just like humans, dogs can develop fevers as a response to infection, inflammation, or illness. While a mild fever might not seem serious, it may indicate an underlying health issue that requires veterinary care and medical attention. As a responsible pet parent, it’s important to understand how to identify a fever in your dog, what might be causing it, and when to seek veterinary care.
What Is Considered a Fever in Dogs?
The typical body temperature for a healthy dog falls within the range of 101°F to 102.5°F (38.3°C to 39.2°C). A fever is usually diagnosed when a dog's temperature rises above 103°F (39.4°C). Anything above 106°F (41.1°C) is considered an emergency and can lead to serious complications or even death.
Common Signs of Fever in Dogs
Dogs can’t tell us when they feel unwell, so you’ll need to watch for physical and behavioral changes. Signs of fever may include:
- Warm ears and nose
- Shivering or trembling
- Lethargy or reduced activity
- Loss of appetite
- Coughing or nasal discharge
- Vomiting or diarrhea
- Red or glassy-looking eyes
If your dog shows any of these signs, consider checking their temperature with a pet-specific digital rectal thermometer for accurate results.
What Causes Fever in Dogs?
Fever in dogs can result from a variety of issues. Some of the most common causes include:
- Infections (bacterial, viral, or fungal)
- Vaccination reaction (mild fever within 24-48 hours after vaccination)
- Inflammatory diseases
- Ingesting toxic substances
- Parasites
- Injury or abscesses
Sometimes, the cause of the fever is unknown, a condition referred to as Fever of Unknown Origin (FUO), which requires deeper diagnostic evaluation.
How to Treat a Dog’s Fever
Never give your dog human medications like ibuprofen or acetaminophen — they can be toxic and potentially fatal to pets. If your dog has a mild fever (just over 103°F) and seems otherwise okay, try:
- Ensuring they stay hydrated
- Encouraging rest in a cool, comfortable space
- Monitoring their temperature regularly
However, if the fever goes above 104°F or is accompanied by other symptoms, consult a veterinarian immediately. Identifying the issue early and starting treatment promptly can help avoid serious complications and support a faster recovery.
When to Call the Vet
Call your vet if your dog:
- Has a temperature above 104°F
- Shows signs of severe discomfort or pain
- Has a fever that lasts more than 24 hours
- Is very young, old, or has a pre-existing health condition
Veterinarians may perform blood tests, x-rays, or other diagnostics to find the root cause and recommend the appropriate treatment.
Final Thoughts
Fever in dogs is a symptom, not a disease in itself. Recognizing the signs early and seeking appropriate care can make a big difference in your pet’s health and comfort. As a caring pet owner, keeping an eye on changes in your dog’s behavior and health is one of the best things you can do.
