In the chicken run area, built wooden frames of 2"x4" with fine mesh on one side (plastic or metal mesh), and plant seeds under the mesh where the chickens can't reach it, and water the seeds, then once the seeds germinate, and the grass starts to grow, remove the wooden frame to let the chickens clear that patch, and have 3 or 4 other patches ready covered with wooden frames and mesh at different germinating and growing stages, that way they will have fresh green grass every day if so desired. The previous chicken manure in the chicken run will provide the fertilizer the grass will need to grow, plus you know that the seed has all the nutrients needed to produce good quality fodder. Thank you for sharing the videos.