I have an over supply and too-strong letdown problem with my 5 week old. Early on, we had latch problems, so I saw a lactation consultant. She advised that I finish the first breast at each feeding, and noticed that I had an abundant supply. She said to burp during the feeding on the first breast to help with his gas problems, and then to put him back to that first breast while doing breast compression to help him get enough hindmilk. She said that he might not be interested in feeding from the second breast.
Basically, my LO never does eat from the second breast during a feeding, he's always full after the first. To stay comfortable and to build my freezer stash, I do sometimes pump the other breast, and usually get 3-4 ounces from it. So I believe that he's definitely getting a full feeding from the first breast, and he's gaining tons of weight and has lots of diapers.
Everything I've read about block feeding says to feed solely from one side for 2-3 hours. But since my LO eats about every 2.5-3 hours now, and only eats from one side, I'm basically already block feeding in 5-6 hour increments, right? The left breast would be used for every other feeding, so it would go 5-6 hours between feedings. But I'm still having way too much supply and I'm engorged most of the time. (I only pump the "unused" side during the feeding between 2 and 6 am, as that's when I'm most engorged, so hopefully that's not a huge factor in the oversupply).
I guess I'm not sure I understand how block feeding works, because it seems like I'm already doing it and it's not helping.