Eating oz

Reb • 👦🏼💚👼🏻🤰🏼💙
Does your baby eat the same amount at every bottle? My 2 month old will eat 4-5oz (mostly at night) at a time but sometimes 2-3oz(mostly during the day) during the day. When he's hungry he HUNGRY and screams till he get something, he'll fall asleep at his daytime feeding and I'll wake him up but he still refuses. Any suggestions? I'd like him to be consistent.