did your PD prescribe you probiotics? if baby is still on BM, you can give him Vivomixx as it contains probiotics + vit D. https://s.shopee.sg/1Viuya2Inp if baby is majority on FM, then you can add Kindernurture probiotics into his milk. https://s.shopee.sg/AA0tIdAPSz
Change to soy milk powder until diarrhoea stop.