We have 6 pullets too and I have noticed this too. We feed organic pellets from Green Mountain. The other day I went to a very good feed store in our area and asked about what I should be feeding them. He suggested Nature's Best organic grower crumbles, and I bought a bag. I took it home and they ate it like they had never been fed. I don't know if the feed was fresher, as my Green Mountain had an expiration of June 2011, so I can't say for sure it is the feed or they did not like the pellets. They never really went at the Green Mountain with any gust, but they had been eating even less lately. They would jump all over greens thrown in the run, and now they are not as crazy when the greens go in. They are also much quieter.
I am still experimenting with feeds and I am considering keeping them on the Nature's Best for now. It comes from PA, and I believe you are in PA, so it should be found all around the state f you want to try it. I really think the crumbles are better than the pellets anyway and will continue to get crumbles whichever feed I finally decide on.