don't worry... my baby was also like that when he was 3 month +. the problem persisted until only recently (he is 4 month and a week old now). he still doesn't eat a lot, about 22 oz per day but the situation is a lot better than before already. so don't worry. just let him but and don't force him. he will go back to normal sooner or later!
我個女(3個半月大)上個禮拜開始又係好似你個b一樣,一見到奶樽就勁喊唔肯食奶,一日只係食到4餐共20安,我要勁"tump"佢,引開佢注意力先至入到支奶入口到。我又俾佢食保嬰丹,twice a week,好似好d,我夜晚o係佢臨瞓前又用米水開奶俾佢食,等佢有多番d營養同瞓得耐d。而家佢都食奶都好番d,個人無咁扭,仲食多o左dd。