Feeding schedule

Hello all. Would like to ask if any parents out there encounter feeding issues for a 9month old baby. Normally my baby is drinking 150ml but nowadays he is drinking less. Sometimes 60ml only. And moreover we are giving him solid food as such porridge and also cereal and he shows great interest in them. However, when drinking milk from the bottle, he doesn’t like it at all. Any parents encountering the same issues? Thanks