- 1. History of retching, hematemesis, aspiration, apnoea, failure to thrive, feeding or swallowing difficulties or abnormal posturing; 2. Gastrointestinal infection within 4 weeks prior to randomisation; 3. Congenital condition and/or previous or current illness and (or) medication use that could interfere with the main study outcomes according to the investigator; 4. Known cow's milk protein allergy, lactose intolerance, or galactosaemia including history of any other allergic manifestations or known allergy to any of the study product ingredients (especially scGOS); 5. Presence of any other gastrointestinal symptom(s)/disorder(s) that are not functional in nature, as assessed by the investigator's clinical judgement; 6. Received any of the following products/medication prior to randomisation: systemic antibiotics, prokinetics, proton pump inhibitors, complementary feeding/weaning within 4 weeks prior to randomisation; 7. Incapability of the parent(s) to comply with the study protocol or investigator's uncertainty about the willingness or ability of the parent(s) to comply with the protocol requirements; 8. Current participation in another clinical intervention study.