bayi 7 bulan susah nk mkn..hanya suka susu

Hi mommies out there, pernah tak ada experience baby tknk mkan tp nak susu je. This happens bila he's with babysitter. Is this normal because dia tknk stranger yg feed him or because he doesnt want to eat? Sometimes at home pun susah nak makan. Paling bnyk pun dlm 5-6 spoons. Please help :(