Taking your pet's temperature The only way to determine if your pet has a fever is to use a thermometer. We show you how to do this with a few quick and easy steps to help you take your pet's temperature safely and accurately. How to take your dog or cat's temperature using a thermometer Are you concerned about your pet? Meet a vet online!Included free as part of many pet insurance policiesHelp, treatment and if you need it, a referral to your local vetOpen 24/7, 365 days a year Book an appointment How to take your dog or cat's temperature using a thermometerWe suggest using a little Vaseline or lubricant on the end of the thermometer to make it easier to insertTry to keep your pet calm, and offer a treat to distract them, so that your pet has a positive experienceIt may be helpful to have an assistant to stroke the pet over the back and support them with a hand under the abdomen to ensure they are standingAs a preparation, touch the anal opening gently with the thermometer before inserting it about 1-1.5 cmDigital thermometers typically beep when the reading is complete, which may take 5 or more secondsThe normal temperature for dogs and cats is about 38.3 degrees celsius at rest.Read more about how to do a simple examination on your dog.