help!! my 4 month old won't eat

Rianna
my son refuse to take his bottles everytime . Yesterday only got 12oz in him and I'm starting to worry, he does not have a fever or cough and I dnt think he is ill. He will chew on his hands, suck his fingers but refuses a bottle even after 9 hours of no food and i hve tried everything nothing is working. I forced him to take about 2oz when he is in that relaxed twlight zone before he drifts off to sleep, and that is the only time. trust me im frustrated now i dnt knw wht to do  he only drinks 10-12 oz frm last past week and pedi said its fine ..😕😕 hws its fine how can he gain weight .