I think your biggest problem may be that your baby is eating quite a bit. If you are pumping, nursing, and supplementing then he still should only be getting like 30-32 ounces. He's eating 3 meals, too, though. I would try to feed him his cereal or whatever in the morning and follow that with about 6 oz. He may need another snack-like bottle in mid-morning, but it should only be 6-8 oz. At lunchtime he's need a veggie or entree and fruit followed with about 6 oz. A mid afternoon bottle of about 8 oz should tie him over til dinner of entree, veggie, and fruit and a 6-8 oz bottle. If you nurse him in morning and night then he may be developing a late stage nipple confusion or desire to get what he wants--which is you and your milk. He can probably tell the difference between the comfort of your nursing and milk and the formula he's given from the bottle when you're not there. Mixing the breastmilk and formula equally, if possible, is my last suggestion. If it's the taste he prefers, then mixing them will help alleviate some of his aversion. Hope this helps. Nursing this long is awesome,and it's great that you are doing so much to get your little one healthy. I have 5 that I nursed and it's not always a picnic. You're a great mom!