I recently added a 10'x20' section to my existing chicken run, and plan to add another 10'x20' in the next few weeks. The existing run for my 7 hens measures 15'x30' and of course is bare dirt. I am wanting to alternate my flock between the new runs so they have a constant supply of green grass. The forage in the new pastures consists of random yard grasses, such as white clover, blade grass, yellow clover and small weeds like dandelions and plantain. Should I till up the existing forage and plant something consistent such as barley or timothy grass, or keep the variety of grasses and weeds already there? Any other advice on rotational grazing would be greatly appreciated.