Trying to come up with something to entertain the flock since they're confined to the run due to predators and my vulnerable garden, I came up with this little gem. I drilled quarter-inch holes in an empty plastic Gator-aid bottle, any plastic soda bottle will do, and filled it with scratch grain. The grain slowly dribbles out as they peck and scratch at the bottle, rolling it all over the pen. It keeps them absorbed all day. And it's completely safe.