My son has been constipated and haven't pooped in a day or two. He is getting similac advance with…

How old is he?

He is a month.

I used to breastfeed him but I don't make 4 oz . He drinks 4 to 5 ounces .

Same thing happened with my son but the doctor told me it wasn't the iron. You can try putting some Dark Karo corn syrup in his bottle. Just a teaspoon. That's what I did.

I breastfeed, so I don't know anything about formula. My lo was constipated and I called the dr. He told me to us a glycerin saposatory (which was gross). I did it and he pooped within 5 minutes and looked so relived. Best if luck to you!!

u can give him half an oz of apple prune juice

it probably is the iron my son gets constipated a lot and one of the drs said it was the iron but they need it

Yes the apple prune juice works great just add to the bottle, but my doctor told me not to use juice until he was 4 months old, so I used the dark Karo syrup and then after 4 months the juice. Only when he had issues

a little prune juice