I've read a lot about putting different kinds of fruit, leaves, grass, etc. into the run so that the chickens have things to poke thru. Has anyone done anything with their pens to give them non-food related things to do? (I've run out of grass clippings & branches, & mine are VERY picky about what they'll eat.) You know, things like ramps, ladders, tunnels, etc. The guy at the hatchery thought I was nuts to even ask.