Pups get their warmth from the litter mates where they sleep piled up in order to gain warmth but will adjust to the change in time. I have four Yorkies and central air. Maybe turning the air down a few notches will be necessary to keep her warm, plus the warm blanket to help should be enough. No need to put a sweeter on her or use a heating pad. We all have to make some sacrifice for the ones we love even if it means your hubby will have to wear less clothes to stay cool.