Impact of Infant Formula on Caregiver-perceived Intolerance

Inclusion Criteria: * Healthy infant * Full-term (\> 37 weeks gestation) * Birth weight \> 2500 and \< 4500 g * 14-60 days of age on enrollment * Singleton birth * Infant's mother has elected not to breastfeed prior to enrollment * Infant exclusively formula-fed for at least 5 days prior to enrollment * Caregiver perceives infant as very or extremely fussy according to perceived fussiness based on the previous 3 days * Caregiver wishes to switch infant's formula * Has not received solid foods * Having obtained his/her legal representative's informed consent Exclusion Criteria: * Known or suspected cow-milk allergy * Currently receiving a specialty infant formula (e.g. thickened, extensively hydrolyzed, amino acid-based, metabolic) * Has switched formula more than two times since hospital discharge * Currently experiencing gastrointestinal or respiratory symptoms secondary to an ongoing infection or virus (e.g. gastrointestinal infection, upper respiratory infection, flu) * Congenital illness or malformation that may affect infant feeding and/or growth * Any readmission to hospital (except for hyperbilirubinemia) prior to enrollment * Receiving probiotic supplements * Infant's family who in the Investigator's assessment cannot be expected to comply with treatment (feeding regimen). * Participation in another study that has not been approved as a concomitant study by Nestlé Nutrition.