i have been nursing for 4 months now. And my baby seems to be picking up weight slowly. I was sick for a week adn could not produce milk and had to supplement with formula. That week he had gained 1.5 lbs. KNow that my milk supply h as come back in he has dropped 1/2 a lbs already. BUT he is more content on breast milk. So i am wondering if there is a way that i can figure out if my breast milk fatty enough, or inadiquate in anyway. I want to desperatly breast feed but if i need to put my ego aside and supplement for my babies sake i will do it. But how do i know? any suggestions?