Adam has 3oz every 2 to 3 hours
so Oliver is fine to be feeding every 3 to 4 hours, thats pretty normal and he prob will feed that often for a while yet.
As for the amount, thats totaly up to him and how hungry he is, there is no set amunt he should or shouldnt be having.
Its said that if a baby drains for than 2 bottles within 24 hours then they are ready to go up another oz.
He will guide you
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