When I switched my daughter to formula (she was two days old) she was throwing up the whole bottle so I asked her dr and they told me to switch her to gentlease and since then she's been doing great.
If he's spitting up and acting fussy then he probably isn't still hungry it's something else like a tummy ache
He barely eats during the day. I try & try to get him too eat. but I haven't fed him over a 2 Oz yet. but right now he is very fussy & wanting to eat again . but I just fed him a 2oz..
Thank you everyone!