What are some good ways to keep my chickens (I have 5) from getting bored and pecking eachother? Though I let them free range on the weekends, I am gone all day during the week so I feel more comfortable keeping them in their covered run, which is about 20' x 5'. What are some toys or things I could put in their run in the morning that will occupy them for a while? I have a toy ball thing which I put scratch in, but they get done with it pretty quickly. Any ideas?