I'm currently rehabbing a roughly 7-8 week old grey squirrel. When I found him he only weighed under 70 grams. I've been feeding formula based on his weight and he has since gained about 10 grams in a few days. I've read that a 7-8 week old should weigh significantly more. Should I be feeding based on his age or continue to feed based on weight? Should I be feeding more than 4x a day? Also we have a fabric pouch set up in his cage with a heated water bottle and he spends almost all of his time in the pouch bundled up. Should this be concerning? Thanks in advance!