I have four hens that have a very large run attached to their coop. It gets plenty of shade from surrounding trees. In the last year they have eaten every green thing in there but have lots of leaf piles to scratch around in. Do they need green leafy things too? They used to roam the yard but destroyed flower beds and I was tired of scrapping droppings off of every hard surface. Egg production has slowed, I don’t think they are eating or drinking as much except when I give them fresh food. Thanks in advance for any insight.