Aduh, I know lah how stressful that is, a few of my mum friends went through this dekat age yang sama. Sometimes dekat sini masa nak transition ke formula or cow's milk, dia jadi picky, especially kalau dulu on breastmilk je. Try nak campur sikit dalam cereal atau oat, atau offer milk in a cup instead of bottle, sometimes psychological thing lang. Tapi since he's so close to 1 year, best check with your pediatrician cepat-cepat to make sure dia getting enough nutrition and rule out anything else, okay?