Thermal Sphynx is a new term to me. Granted I am still strying to catch up on all the developments and changes with the breed. But I know just the right bunch of people who can help me! Is it a term for kitties changing color with the seasons? How is this passed off to offspring? How do you know if a kitten is a thermal? How do you register the color on TICA and CFA papers? Are there health concerns associated with them? Thanks for helping an old dog learn something new.