Aww, mama, nakaka-alala talaga yan! First thing, gaano katagal na hindi siya kumakain, at kumusta naman siya overall (may fever, may diarrhea, o normal lang)? Because kung ilang oras lang at active pa rin, sometimes basta rest lang or may upset stomach, pero kung extended na or may ibang signs, kailangan talaga i-check ng doctor agad para ma-rule out kung may underlying issue.