Ay, gumawa na kami ng switch from Enfamil to Nestogen with my daughter, and honestly okay lang siya, pero it took maybe a week or two para ma-adjust ang tummy niya, kaya don't worry if may slight changes sa poop or gas muna! A few of us tried switching formulas and the key talaga is gradual, so do it step by step, maybe mix the old formula with the new one para smooth ang transition. Kung may concerns ka though, especially kung may rashes or persistent tummy issues, better check with your pedia para sure lang. What's your baby's age? Sometimes it matters din kung gaano kalaki na sila!