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What Should the Temperature, Heart Rate, and Respiratory Rate of a Dog Be? The normal body temperature of a dog is 101 to 102.5 degrees Fahrenheit, which is much higher than that of humans, who have a body temperature of 97.6 to 99.6 degrees Fahrenheit. Dog fever is defined as a temperature of more than 103 degrees Fahrenheit. Serious and even fatal consequences can develop when temperatures hit 106 degrees Fahrenheit.