My coop and pen are in the back yard where there's all sorts of trees which of course have dropped their leaves and the chickens are having a great time digging through them. I noticed that with certain leaves they were doing the "grab and thrash", I thought at first there might be bugs on them, but realized they were singling out the leaves with a white bottom, and will tear them apart and devour them. If I hold onto one, they all come running and snarf it down as if it were a treat. I'm pretty sure they're Silver Aspen leaves. Does anyone else have this experience with them? I haven't seen them going after any other leaves (there's Mulberry, Maple, Walnut, Oak, and a couple others I'm sure) and they're all about the same (some dried, some fresher). I'm not really worried about the leaves being harmful, just seems kinda odd.