To know if your cat has a fever, the most reliable method is to take its temperature, as symptoms alone can be inconclusive.
How to Check if Your Cat Has a Fever
- Normal Temperature: Cats normally have a body temperature between 100.4ºF and 102.5ºF (38ºC to 39ºC). A fever is defined as a temperature above 102.5ºF (39ºC)
- Taking Temperature:
- The best way is with a digital rectal thermometer designed for pets or a pediatric rectal thermometer.
- Lubricate the thermometer with petroleum jelly and gently insert it into your cat’s rectum, being careful not to insert too far to avoid injury.
- Leave the thermometer in place for at least two minutes to get an accurate reading.
- Ear thermometers can be used but are less accurate than rectal ones.
- Never use mercury thermometers as they are dangerous if broken
- When to Seek Help:
- Temperatures above 106ºF (41.1ºC) are dangerous and require immediate veterinary attention.
- If you are uncomfortable taking the temperature yourself or your cat shows signs of illness, contact your vet promptly
Signs and Symptoms That May Indicate Fever
While only a thermometer can confirm a fever, common signs include:
- Loss of appetite
- Lethargy or weakness
- Shivering or trembling
- Hiding or behavioral changes such as irritability or seeking more affection
- Decreased grooming
- Increased heart rate
- Warm ears, paws, or face (though this is not a definitive indicator)
- Dehydration signs like dry or sticky gums
- Vomiting or diarrhea in some cases
Summary
- Use a digital rectal thermometer to measure your cat’s temperature accurately.
- A fever is a temperature above 102.5ºF; above 106ºF is an emergency.
- Watch for symptoms like lethargy, loss of appetite, shivering, and behavioral changes.
- Contact your veterinarian if you suspect a fever or your cat appears unwell
