Sonic in mid October 2021, in his new large basket. I put a really soft pillow, that I took from my bedside and put it into that basket, to make it extra soft and warm. I would also put hot water bottles underneath him. I made them just body temperature and then covered him with a blanket. Because he was so thin, his body temperature was lower than normal and this kept him warm and comfy. It was enough to warm him up for a long time, even if he got out of the basket to walk around and hang out somewhere else. It warmed him for quite a while. He also always had a valerian root cushion, because he loved to either lay his head on it, or just hold it like in this photo.