Fever in Dogs: Signs, Symptoms and Treatments

When your dog seems off, maybe they’re sluggish, panting more than usual, or their nose feels warm, it’s natural to worry. One possibility that might not immediately come to mind is fever. While a fever in dogs can sometimes be a mild, short-term response to something minor, it may also be a sign of an underlying issue that requires veterinary attention. In this blog, we’ll walk you through what fever in dogs really means, how it presents, and how veterinarians typically approach treatment. If you notice any concerning changes in your dog’s behavior or physical condition, call Parrish Veterinary Clinic & Urgent Care at (941) 216-2335 or request an appointment today.

What Is a Fever in Dogs?

A fever in dogs refers to an elevated body temperature above the normal range. A healthy dog’s temperature typically falls between 101°F and 102.5°F. Anything higher than 103°F is generally considered a fever, and temperatures above 106°F can become dangerous. Because dogs can’t tell us how they feel, catching a fever often requires careful observation.

Why a Dog’s Temperature May Rise

Fever in dogs often stems from the body’s response to infection or inflammation. Just like in people, the immune system produces a fever as a defense mechanism. However, fever isn’t always linked to infection. It can also result from autoimmune conditions, heat exhaustion, or reactions to certain medications or vaccines. Sometimes, a dog may experience what’s called a fever of unknown origin (FUO). In these cases, diagnostics may take longer as the root cause isn’t immediately obvious.

Common Signs and Symptoms of Fever in Dogs

Recognizing a fever in dogs starts with spotting subtle behavioral and physical changes. These symptoms may not always point directly to a fever, but they are important red flags that something isn’t right.

Physical and Behavioral Changes to Watch For

• Warm ears or nose – While not reliable on their own, unusually warm ears or a dry nose may be an early clue.
• Lethargy – A drop in energy levels is a common symptom associated with fever and illness.
• Shivering or trembling – This can be a sign your dog’s body is trying to regulate an elevated temperature.
• Loss of appetite – If your dog is suddenly not interested in food, it may be because they don’t feel well.
• Coughing or nasal discharge – These signs often point to a respiratory infection that may be causing the fever.
• Panting or rapid breathing – Increased respiration can be a sign of fever or discomfort.
• Red or glassy eyes – Inflammation can cause changes in the eyes during a fever episode.

If you observe these symptoms together, especially if they persist or worsen, contact your veterinarian. Call (941) 216-2335 to schedule a visit with the team at Parrish Veterinary Clinic & Urgent Care.

What Are Some Causes of Fever in Dogs? 

Identifying the source of a fever helps guide treatment. While some causes are relatively mild, others can point to more serious health issues. Below are some of the most common reasons for fever in dogs.

Infections

Infections are one of the most frequent triggers of fever in dogs. These can be:

• Bacterial – such as infected wounds, abscesses, or urinary tract infections.
• Viral – including illnesses like parvovirus or canine influenza.
• Fungal – systemic fungal infections can also result in prolonged fever.

Inflammatory Conditions

Conditions that cause internal inflammation such as pancreatitis, arthritis, or autoimmune disorders may also lead to elevated body temperature.

Vaccine Reactions

Mild fevers can occasionally occur within 24–48 hours after routine vaccinations. These fevers are usually short-lived and resolve without intervention, but they should still be monitored.

Toxins and Ingested Substances

Exposure to certain toxins or poisonous plants may trigger a fever response. If you suspect your dog may have eaten something harmful, prompt veterinary care is essential.

How Veterinarians Diagnose Fever in Dogs

When you bring your dog to Parrish Veterinary Clinic & Urgent Care for possible fever, our care team will start by taking a rectal temperature to confirm the fever. From there, they will work through a list of potential causes based on your dog’s symptoms and history.

Steps in a Veterinary Evaluation

• Physical examination – A full-body check for swelling, discharge, pain, or signs of infection.
• Blood work – To assess white blood cell count, organ function, and detect systemic infection.
• Urinalysis – To rule out urinary tract infections or kidney involvement.
• X-rays or ultrasound – If a deeper infection or internal issue is suspected.
• Culture tests – To pinpoint bacterial or fungal organisms and determine the appropriate antibiotic.

These diagnostics help guide the next steps, especially if the fever doesn’t have an obvious cause.

How Fever in Dogs Is Typically Treated

Treatment depends on what’s causing the fever. Once your veterinarian has identified the source, they will determine the most effective way to bring your dog’s temperature down and treat the underlying problem.

Common Treatment Approaches

• Antibiotics – For bacterial infections.
• Anti-inflammatories or corticosteroids – For autoimmune or inflammatory conditions.
• IV fluids – To correct dehydration and support organ function.
• Rest and monitoring – Some mild cases may only need supportive care under veterinary supervision.

It’s important not to give your dog any human medications, including aspirin or acetaminophen, as these can be harmful or even fatal to pets.

When to Seek Emergency Care for Fever in Dogs

A mild fever might not require urgent care, but certain signs indicate your dog needs immediate veterinary attention. Acting quickly can prevent complications and protect your dog’s health.

Signs Your Dog Needs Immediate Help

• Temperature over 106°F
• Seizures or collapse
• Persistent vomiting or diarrhea
• Unresponsiveness or confusion
• Bleeding or unusual bruising

If any of these symptoms occur alongside fever, call Parrish Veterinary Clinic & Urgent Care at (941) 216-2335 right away.

Why Prompt Veterinary Attention Matters

Even a low-grade fever in dogs can escalate if not properly managed. While your dog may seem fine one moment, their condition can change quickly if the underlying issue progresses. By seeking veterinary care early, you can help your dog avoid unnecessary discomfort and ensure any serious health concerns are addressed without delay. Veterinarians have the tools and training to diagnose and treat a wide range of conditions associated with fever. Whether it’s a simple infection or something more complex, a timely evaluation sets the stage for the best possible outcome.

Get Support When Your Dog Needs It Most

Fever in dogs isn’t always easy to spot, but paying attention to subtle signs and changes in behavior can make a difference. If you’re concerned your dog may have a fever, trust your instincts and schedule an exam with a veterinarian at Parrish Veterinary Clinic & Urgent Care who can help. For expert veterinary care in Parrish, FL, contact Parrish Veterinary Clinic & Urgent Care at (941) 216-2335 or request an appointment online. Whether your dog needs urgent care or a general wellness check, our team is here to help.