Ay, ganyan din nangyari sa amin dati with my second baby, ang Similac Tummy Care talaga ay medyo off sa lasa for some kids! A few of us moms tried mixing it with a bit of boiled water para hindi masyadong malalasa, or gradually mixing the old formula with the new one para sa transition, pero honestly kung ayaw talaga niya, worth asking your pedia what other options might work better for his digestion since kailangan lang nang formula na gentle sa tummy pero palatable para sa baby.