When they grow ok
Often babies go thru variations in their feeding
volumes but a simple rule is baby can take up to half their poundage as a feeding.
(10lb=5oz). More or less at a given feed is ok.If your baby is wetting diapers every 4-6 hrs and filling out, things are going well. Your doctor can verify normal growth at checkups. Try not to confuse their reflex sucking activity after feeds as a need to feed more.