Taking a dog's temperature

A dog’s temperature is most reliably measured rectally with a digital thermometer. A warm or dry nose is not a dependable indicator of fever.

What you’ll need

• Digital thermometer reserved for your pet
• Water-based lubricant (such as sterile lubricant)
• Disposable gloves and paper towels
• Treats and, ideally, a second person to help calmly restrain your dog

Before you begin

• Choose a quiet, well-lit area and stay calm.
• Avoid taking the temperature immediately after vigorous exercise, excitement, or exposure to heat; allow your dog to rest first.
• Label the thermometer clearly and do not use it for people afterward.

Step-by-step

1. Prepare the thermometer. Turn it on and apply a small amount of water-based lubricant to the tip.
2. Position your dog. Have your helper steady the dog in a standing position, or gently hold the dog on its side. Keep the tail controlled without pulling or twisting it.
3. Lift the tail gently. Raise it at the base to expose the anus.
4. Insert carefully. Slowly insert only the lubricated tip into the rectum—about 1–2 cm (½–¾ inch) for a small dog and up to about 2–3 cm (¾–1¼ inches) for a larger dog. Never force it.
5. Wait for the reading. Keep the thermometer steady until it signals that the measurement is complete.
6. Remove and clean. Withdraw it gently, read the result, then disinfect the thermometer according to the manufacturer’s instructions. Wash your hands and reward your dog.

Safety first

• Stop immediately if your dog struggles intensely, shows pain, or may bite. Do not risk injury; ask a veterinary professional to take the temperature.
• Never use glass/mercury thermometers, and never insert a thermometer vaginally.
• If you cannot safely obtain a reading, contact your veterinarian rather than forcing the procedure.

Understanding the result

Normal temperature varies with the individual and measurement method. In general, a dog’s rectal temperature is approximately 100.5–102.5°F (38.1–39.2°C). A single slightly abnormal reading should be rechecked after the dog has rested, provided it is safe to do so.

• Contact your veterinarian promptly for a persistent temperature around 103°F (39.4°C) or higher, or for a low temperature around 99°F (37.2°C) or lower.
• Seek urgent veterinary care for extreme readings or any temperature abnormality accompanied by weakness, collapse, difficulty breathing, repeated vomiting, severe diarrhea, seizures, pale/blue gums, or other concerning signs.
• Puppies, very small dogs, seniors, and dogs with chronic illness may need individualized guidance.

Temperature alone does not diagnose the cause of illness. When in doubt, call your veterinarian.

Video demonstration

How to Take a DOG's TEMPERATURE - Only Reliable Method - YouTube