Should my 3 week old be eating 4 oz?
Babies fed infant formulas usually will feed every 3 – 4 hours during the day. During the first 2 weeks, babies will eat on average 1 – 2 oz at a time. By the end of the first month they eat about 4 oz at a time. By 2 months, increase to 6 oz per feed, and by 4 months, about 6-8 oz per feed.