NAN HW in general is OK kasi hypoallergenic milk sya. good for babies na may allergies or will prevent babies to have one. yun nga lang, ayaw talaga ng baby ko sa kanya. and we conclude, its because of the taste. creamy kasi sya, so its bit mapait, unlike sa milk my baby been used to na of sweeter taste. the thing is, my baby usually get allergies, just like recently, we had to give her NAN HW again kasi been 2 weeks na yung allergies sa face and body niya. the problem was, she was able to consume about 3 bottles of 5 oz milk only for 24 hours when her usual milk consumption was 6 bottles. namayat sya agad kasi ayaw sa lasa ng milk. so if you're going to switch milk, better do it interchangeably with your current.
nga pala, warning lang, the first time my baby had NAN HW, nag-umpisa sya ma-constipate. umabot sya ng about 3-4 days before ma-poops. other SP moms also experienced the same. may similar thread nyan dito.