What's your schedule? Do you mix for each feeding, alternate, etc?
Also, how is LOs digestion? We just started adding formula because he wasn't gaining enough weight. My supply was low, but i'm working on it. He's happier since we started adding formula, but I think he may have belly pains. His poops are different (which I guess is normal) but they are just as frequent, so I don't think he's constipated. I'm wondering if it's maybe the type of formula or just that we're mixing?