a playground for my chickens and ducks

I used to let the chickens and ducks roam the grounds. I enjoyed watching them explore. They seemed to enjoy it so much. However, they damaged so many flower beds and plants and the coyote and bobcat carried so many away, I now keep them penned up. Of course, in doing that, they scratch away all of the grass and there is nothing but dirt. In this hot west Texas environment, it can be so dusty and miserable. They have no trees in their yard. They have boards mounted to give them shade. They have a large house and a large yard to run around in. Last year, I found a young honey locus tree growing in the flower bed. I dug it up and planted it in a container. It has grown and done well and leafed out so pretty this year. Today, I penned off a section of the chicken yard and tilled up the ground. I planted the tree in the middle and then planted grass seed. Hopefully, the tree will grow and they will have some nice shade next year. As for the grass, it's just for their enjoyment. I know it won't last long.