I recently lost a 25' Spruce tree and in its wake--opened a big hole and space in my yard. The number one problem is the bird's lost wonderful shade and protection from aerial predators, number two--without the tree--the area has turned into a muddy mess. I am thinking of planting a grove of blueberries and other fruit bushes and need some ideas for the actual run around the coops. The chickens eat the grass and I don't like the baked clay look and would like to know of any ground covers that are hardy in zone 6. If there is a grass seed that is tough enough-- I would be happy to reseed. Thanks