Abstract: A fever detection system includes a temperature sensor; and a dog collar including a power source, an output device, and a processing circuit coupled to the power source and the output device. The processing circuit is configured to: periodically receive temperature measurements from the temperature sensor, based on the received temperature measurements, determine whether the received temperature measurements exceed a set temperature limit, and upon determining that the received temperature measurements exceed the set temperature limit, transmit a signal to the output device to activate a visual and/or auditory output indicating detection of a fever (including overheating).