A “fever” is an increase above the dog’s normal body temperature. Normal canine body temperature is between 99.5° and 102.5° F. Generally, 103° F is considered a low-grade fever in a dog.
Call your vet about any temperature above 103°F. Your dog’s body temperature can rise rapidly, especially if he is suffering from heat stroke. Severe fevers of 105° to 107° F can damage internal organs, which is a veterinary emergency.
Fevers can have a variety of causes. An infection, either bacterial or viral, that agitates the immune system can cause a fever. Your dog’s temperature will rise if he is overheated or has had a seizure.
Some microchips take body temperature
Know your dog’s normal temperature
Ideally, you should know what is normal for your individual dog, as dogs can vary in what is normal. Don’t count on his nose to diagnose fever. If the air is hot and dry, chances are your dog’s nose is hot and dry. Instead, get an accurate temperature reading.
Take his temperature at a time when you know your dog is feeling well, so you can compare it if you suspect he is sick. If it’s too late for that, put it on your “to do” list for when you recover.
How to take a dog’s temperature
The most common way to measure your dog’s temperature is by using a rectal thermometer. His family will appreciate that he has a thermometer just for his pets. Digital rectal thermometers tend to be faster, are just as accurate as the older mercury ones, and may be easier to read. Either way, a thermometer should be part of your pet’s first aid kit.
To take your dog’s temperature:
- Lubricate the thermometer with a little Vaseline, KY Vaseline, or baby oil. If you don’t have any of that, water is better than nothing.
- Gently lift your dog’s tail and insert the thermometer into the anus. This is usually a two-person job: one person to hold your dog’s head, talk to him, and steady him while the other person handles the thermometer.
- Wait until the beep for a digital thermometer or one minute for a normal one.
- Remove the thermometer and read and record the temperature.
Note: Ear thermometers can be used on your dog, although some vets don’t believe they are as accurate.
