Is my baby eating enough ?

So my newborn LOVES to sleep he does it all day and I’m worried I’m feeding him too little BUT this is not because I’m letting him sleep all day, whenever I wake him so he could eat he falls right back asleep as he’s eating and then I have to continue to try and wake him but I guess he’s a heavy sleeper. He drinks about 4-6 bottles of the 4oz avent filled with formula everyday, is that okay?

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