Question: how many ounces should my 4 week old baby eat?
Answer: Your 4-Week-Old Baby's Development Breastfed babies should eat as much as they want at this age, but a general rule of thumb is roughly 12 to 32 ounces of breast milk. Generally 16 to 32 ounces in 24 hours, is a good benchmark for formula-fed babies. Listen carefully and you'll be able to decode his different cries.