The ears and nose of a dog are often good indicators of their body temperature. If they feel warmer than usual, it could suggest a fever. : The belly and paw pads can also provide some indication of body temperature. If they feel excessively warm or hot, it might be a sign of fever. Feeling your dog's body temperature with your hand can give you a general idea, but it's important to note that the most accurate way to determine a dog's temperature is by using a rectal thermometer specifically designed for pets.