Re: 6 week old eating a lot
8 oz does seem like a lot, even for a growth spurt at this age. Are you basing 7-8 oz on a normal amount for you to pump? If so, you may be engorged from an oversupply that already existed. The pain could be cause by a poor latch because of the engorgement. When my breasts are full, it's often painful to latch my LO. I find it helpful to hand-express a little bit of milk or press back on the areola (reverse pressure softening). My LO eats 4-5 ounces of expressed milk when my husband gives him a bottle, but I think he probably gets more when he nurses from me. I respond way better to the baby than to the pump.
There are three reasons for breast-feeding: the milk is always at the right temperature; it comes in attractive containers; and the cat can't get it. ~Irena Chalmers