Morning! I have some ideas that might help. When I babysat my SIL 1.3lb baby I was terrified that she would go hypo on me cause she wouldn't eat anything either. So here are a few things I tried and she ended up eating like a little pig. First thing in the morning (cause that is when she would usually go down from sleeping all night) I would give her a tiny bit of the nutracal, after about 30 mins she would eat usually baby oatmeal cereal mixed with puppy replacemnt milk, she would lap that up, I would also change up and feed her boiled hamburger and cottage cheese. I had to make sure it was warm or she wouldn't touch it

I also would feed her every two to three hours. She thrived. In the week I had her she gained 3 oz. She also loved goats milk. I can understand your frustration and worry. I was cooking everything and buying everything I could think of to get her to eat. But the two meals I mentioned above is what I found she would eat like crazy and make sure it is warmed up.
I hope this helps
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Mommy of Cody,Gracie,Bella,2labs,1cat, 2 skinkids
one Angel Baby Boy

8/8/09 I carried you under my heart for 20 weeks and will carry you in my heart forever