Please!

Okay, so I am stressed out about Little Prince.  He is tiny.  He is underweight.  And he hasn't eaten since he got sick.  He is feeling better today.  He is alert,  chatting,  and happy.  He has a cough, but he is better.  BUT  I can't get a single bite into him.  It has been 2 1/2 days, I really need him to eat.