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Question:

Cat with sudden fever and high white blood cell count

I'm really worried about my sweet cat, Luna, and hoping someone might have some advice. She was her usual playful self just a couple of days ago, but she started acting really lethargic and wasn’t interested in her favorite toys. I took her to the vet yesterday after she seemed to have a fever, and they ran some tests. The results came back showing a high white blood cell count. The vet mentioned this could mean an infection, but they couldn't pinpoint anything specific right away. They've given her some antibiotics, but I'm freaking out a little about what could be going on. Has anyone else experienced something like this with their kitty? I’m so anxious to see her not feeling well, especially since she usually bounces off the walls. Any insights or similar experiences would really help calm my nerves!

Answer:

Hello! I'm sorry to hear that your cat is feeling under the weather. A sudden fever and high white blood cell count can be concerning, but let's explore what might be going on.

These symptoms could indicate an infection, as the body raises its temperature to fight off invaders, and white blood cells increase to help battle the infection. It could be a bacterial, viral, or even fungal infection. However, other causes might include inflammation due to conditions like pancreatitis or an autoimmune disease, where the body mistakenly attacks its own tissues. It's important to monitor your cat for additional signs such as lethargy, loss of appetite, vomiting, or changes in behavior.

In terms of care, ensure your cat stays hydrated. Fresh water should be readily available, and you might want to encourage small, frequent meals to maintain nutrition. Keep your cat in a comfortable, stress-free environment to help recovery.

Watch for any worsening symptoms, like difficulty breathing, persistent vomiting, or extreme lethargy, as these could indicate a more serious condition requiring immediate veterinary attention.

To assess your cat's condition more precisely and discuss possible tests or treatments, please consider scheduling a video consult with one of our vets at Dial A Vet. We're here to help you both through this.

Answered by

Louise - Senior Veterinary Nurse, Dial A Vet

June 17, 2025

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The "Ask a Vet" forum on Dial A Vet offers general information and helpful tips on pet health, but it's not a substitute for professional veterinary care. The advice here doesn't create a veterinarian-client-patient relationship, and our vets can't diagnose or treat your pet remotely. For emergencies or specific medical concerns, always contact your local veterinarian immediately. Your pet's health is unique, and decisions should only be made after consulting with a qualified professional. By using this forum, you acknowledge these limitations and agree to seek in-person veterinary advice for all your pet's health needs. View our content guidelines.
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