I had this plan last year to expand my chicken run. It was only 25x25 and the chickens kept the grass down pretty good. I thought, "If I fence in more area, they will keep that 'mowed' too". I fenced in a 5000 square foot area for them. I guess that is too big cause the grass is growing like crazy. Im looking to get something that can share an area with them that eats grass, and not a goat, too noisy. Mini horse, mini donkey, lamb, sheep...Which one is the quietest and will eat the most grass?