Today I noticed a whole bunch dark green poop in the bedding of my chicken run. I've given them green cabbage hung on a bungee cord before which they love but today was the first time I gave them red cabbage because it was on sale at the grocery store. The only other new thing is that I emptied in some bean sprouts that were a little on the old side. They otherwise seem to all be acting normal. So is the green poop from the cabbage or should I be worried??