hello my son is 6month old and started his solids but he refuses to drink milk and he is formula fed since birth...he hardly drinks 120ml every 3-4hours

A. Hai good morning !! Due to semi solids feels full and intake of milk reduces . Few foods like mashed banana,cerelac,kichdi or any high calorie,high protein takes time to digest so wont get hunger . No worries check if baby is gaining weight ,active and achieving milestones or not. Include more water,fluids for hydration.