I’ve had this baby squirrel for over 3 weeks and he was growing and was healthy and moved a lot and ate well. He was 6-7 weeks old so we took I’m off his heating pad. It was off for about 38 hours and we found him yesterday morning cold and he wouldn’t eat and he didn’t want to move. We put him on a heating pad. A few hours later we he was dead and stiff. What was he cause of his death? We had him so long and he was doing perfectly and moving just the day prior. We’re heartbroken