Mama, while frequent pooping is often normal sa formula-fed babies, ang sudden change in frequency at appearance (yellow-green, seedy) in just a few days ay worth checking with your pediatrician, better safe than sorry, lalo na kapag may shift. Hindi ka mag-iiba ng formula on your own muna, kasi kailangan malaman ng doctor kung ano talaga ang nangyayari bago mag-switch, but I'd call the clinic today or bukas pa lang para ma-assess ng doc. A few of us moms experienced similar changes, at minsan kailangan lang ng doctor's guidance kung normal ba or may adjustment needed, kaya huwag mag-alala muna, just get professional input, okay? Your baby's feeding well and walang fever, which are good signs, pero ang iyong instinct na nag-concern is spot on.