Ah yan normal lang yan sa mix fed babies, lalo na kung may Nestogen! A few of us tried different formulas at parang ganyan talaga ang poops, sometimes loose, sometimes mas formed, depende kung ano na-digest ng baby. The feeding-then-pooping thing is also super common, especially sa newborns and younger babies kasi triggered lang ng gulping, so wag mag-alala doon. But kung parang diarrhea na talaga (very watery, frequent, or may mucus/blood), or kung concerned ka about color or consistency, mas magaan ang isip mo kung i-check with your pedia lang para sure, basta ganyan lang ang dating at healthy naman ang baby mo, you're probably fine!