I discovered today that my cat's RFID chip provides the temp. I thought it was pretty cool. He is running a bit cold :/ He has been sick for a bit, but at the vet, his temp is always good, most likely from the vet stress. And we won't let me stick a probe in his butt, so this is a great option to monitor him.
https://www.msd-animal-health-hub.co.uk/ahp/homeagain-thermochip-and-thermochip-mini


