Sis, at 7 months okay na usually to introduce formula if gusto mo mag-switch, pero best talaga na kausapin mo muna ang pedia nito para sigurado sa health ng baby mo at kung well-tolerated niya ang Bearbrand, bawat baby iba kasi ang digestive system! One of my mum friends nag-switch din around that age, pero gradual siya ginawa para walang tummy upset, so if okay ng doctor, pwede mong i-mix muna with his current formula before full switch. Good luck, mommy!