Taking your dog or puppy’s body temperature need not be a Herculean task, if you know how to do it right!
Using a rectal thermometer
When to contact your vet
Contact your veterinarian if the temperature falls below 99°F or rises above 103°F. High temperatures can be a sign of an infection or an illness. A low temperature, on the other hand, can indicate shock or other serious illness. In either case, it's best to practice caution.