Aiyoh, I get why you're worried lah, but honestly once solids start, the milk intake will drop naturally, a few of us went through the same thing and our babies were fine, they're just getting calories from food now instead. That said, the sudden drop from 24-30oz to 10oz is quite drastic, so best to check with your paediatrician just to make sure everything's okay and maybe they can advise on milk intake at this stage. In the meantime, try mixing the milk into his solids (porridge, cereal) or offering it in a cup instead of bottle, one of my mum friends' baby suddenly took milk better dari cup, weird but it worked for her!