Uy normal lang yan, mommy! Kasi ang bawat formula may slightly different taste at thickness, so sometimes babies drink konti lang habang nag-adjust pa lang sila sa bagong lasa, a few of us din nag-switch and napansin namin ganyan talaga for the first week or two. Try mo na lang mag-mix ng little bit ng Nestogen sa Bear Brand para mas smooth ang transition, o just push through kasi usually after a few days tumatagal na ang baby pag naka-adjust na. Pero if patagal na ito nang sobra-sobra talaga or if may concern ka sa weight gain at appetite niya, best to check with pedia mo para ma-rule out kung may ibang issue, better safe than sorry, diba?