My chickens usually attack the feeders in the morning. It's like a scrimmage. Last week, the TSC had nothing but pellets, and we were out of food, so I bought those rather than the crumbles the girls have eaten for years. Yesterday, when I went to turn the light on at dusk, I noticed that there was at least a scoop full left in the one feeder (I give them 6 scoops, or about 12 c.). Today, they didn't seem interested. Do they just not like this form of feed -- it's the same brand and % protein -- or is there another possible issue?