i assume you are pumping your breasts. otherwise nature does not really allow you to know how many ounces your baby is getting. basically. breast is best so give him what he wants. cereral at this age is just practice eating so a few ounces is just fine. mix the cereal with the breast milk.
how much should i feed a 5 1/2 month old cereal? also how much breastmilk should he be getting in a day?