Eating Disorder for my Puppy

HELP! Everything I feed this little puppy, she eats once and then never again. I am at my wits end. I am so afraid of her losing weight she can't afford to lose. She could go into a hypoglycemic coma! Help me someone please. I am willing to try anything. I have gone through about 7 different foods. (My golden gets all she won't eat and he is in heaven.) I have even cooked for her, and even that she poopoos. Do I starve her?