You mentioned you were feeding. How often are you feeding and how much feed are you putting out at each feeding. We have very large coppernose and all we do is feed and fertilize. Our kids were fishing this weekend with live worms at about 6 ft right below our feeder and we caught 45 bluegill in 30 minutes. I only mention this because everything you've said sounds so foreign to me from our situation. We can sit there and watch those large bluegill feed on pellets any time we want. The larger ones dominate the feeding for us.