S.H.
Is this at dinner time?
MANY times, if a child is tired or over-tired... or dinner is too late... they get fussy and/or cannot eat, even if hungry.
My kids are this way.
Thus I have dinner earlier, for them.
Solves the problem.
Whenever my kids are tired or over-tired.... they CANNOT eat, even if they are hungry. They are not being willful. They are just, over-tired.
Dinner does not have to be a battle. No matter how picky the child may be.
My son is picky. My daughter is not. We don't have food battles or meal time battles.