I am going to be away for about 10 days in June. My chickens will need to stay in the chicken yard while I am gone. They usually free range about 5-6 hr. a day. Some one will feed and water them daily but NOT LET THEM OUT. Is there something I can A. put in the chicken yard to substitue for them not being able to free range ? Like Alfalfa hay or ?? B. Is there something I can prepare ahead of time in zip bags and leave in the fridge to be thrown in the chicken yard daily. Thanks !