Hi po! Okay lang yan, sometimes ang babies talaga ay may inconsistent poop kahit sa same formula, a few of us moms noticed na Similac Gain Plus can be filling kaya minsan soft, minsan solid depending sa baby's digestion na rin. Since wala siyang other food pa at consistent lang ang 2x a day, I'd suggest observe muna for a few more days if may other signs like bloating, fussiness, or rash, pero if umiiba pa siya or you're really worried, it's best to check with your pedia kasi they'll know baby's history better. Keep an eye lang, and you're doing great noticing these things!