So my son's is 8 weeks and since day 1 when he was born I gave formula the hospital gave me the Similac advance he has being in this ... until Tuesday that I switched because he had alot of gas with now he's on Enfamil gentlese for fusiness and gas and think is working but the only thing I don't like is the color of his stool is green and it doesn't change of color even if breast feed him I have low supply but I give him what I have .. my question is is the stool color normal,for he age ?? the doctor it is but I don't think it is any advice !!