I had two that required assist feeding this year, and while thats all the experience I have, I will share it with you. Just getting some nutrition in them will go along way. Don't worry about rushing it. If its a baby you can easily go with rat fuzzies and it should be able to handle them. I would go with evey 5 days and let it get some meat back on it. It took me 8 times assisting them before they started eating on their own. Good luck