So my baby will be two months tomorrow and few days ago l started giving him formula (one feeding) at night. I pump so l usually give him 3.5 oz every 3 hours. My question is do l give him same amount of formula? Or do l need to give him more? Seems like with formula he drinks it faster. I'm giving him Enfamil AR and using nipple size two ( this could be a reason why he is done so quickly)