After multiple predators sightings (coyote and possible bobcat) my husband has declaered that the chickens can no longer be let out and need to stay in the coop. They are used to being out everyday, I think it makes them happy chickens and I like to see them running around the place. What are some things that I can do to keep them entertained? They get diffrent food treats everyday that I just put in a bowl for them. I want to keep them happy and don't want them to become bored! Thanks in adavance!