How to take a dog’s temperature

Jul 26,2025
4Min

How to measure a dog’s temperature? Rectal thermometry: After returning the thermometer to zero, smear some Vaseline or water on the top to lubricate it, lift the dog’s tail, insert the thermometer gently, and leave it for 2 minutes; measure the temperature at the base of the hind legs The method is to raise the dog's legs, sandwich the thermometer between the hind legs and belly, and leave it there for ten minutes.

Rectal thermometry

1. Shake the thermometer and the mercury returns to zero.

2. Apply a little Vaseline to the top of the thermometer to lubricate it to avoid causing pain to the dog during insertion.

3. Find an assistant to help. The assistant fixes the dog's head and forelimbs and comforts them, while the measurer lifts the dog's tail.

4. Gently insert the thermometer about 2cm into the dog’s anus.

5. Generally speaking, the thermometer stays in the anus for about 2 minutes. During this period, they cannot leave the owner's supervision.

6. Pull out the thermometer and read the temperature.

7. Store the thermometer after alcohol disinfection.

Temperature measurement method at the base of hind legs

(1) Lift the dog's legs and clamp the thermometer on it, so that the thermometer is tightly clamped by the hind legs and belly.

(2) For small dogs, the temperature can be measured while holding the dog, or it is better to measure the temperature while the dog is sleeping or lying down. For large dogs, it is recommended to test when the dog is sleeping or lying down to avoid strong resistance from the dog. It is best to have one person help soothe the dog and distract it. One person takes the temperature.

(3) Place the thermometer on the inside of the dog’s hind legs, where it is connected to the belly. The principle is similar to how humans measure body temperature under their armpits.

(4) Since the body surface temperature is lower than the rectal temperature, it needs to be measured for 10 minutes before removal. The temperature at this time needs to add 0.5 degrees.

Notes:

During the measurement process, pay attention to keeping the dog quiet. If the dog moves, your hands should also move with it to prevent the thermometer from being folded in the rectum.

If it is between 37.5℃-39.2℃, it means the dog is normal. Higher or lower temperatures may be a sign of illness. If your body temperature is above 39.5°C or very low, please contact your veterinarian immediately. Wipe the thermometer clean with an alcohol swab or toilet paper.

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