Is 30.2 pounds overweight or underweight for a 4 year old?

My niece has been losing a lot of unhealthy weight and I’ve talked about it with her mom and her father who say that they are concerned too but don’t have child support, or Medicaid to send her to one. She’s currently 30.2 pounds while last time she was 35.9 pounds

However I’ve noticed that she’s been skipping meals and throwing away what she doesn’t like.

How can I get her to eat? Please help!

P.S. I didn’t know where to put this...

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