Hello, my wife and I are new to Chickens. We have 15 hens. We are from Indiana. My wife was hesitant about getting the feathered creatures but we have had them for a few months and she loves them. She is even wanting to buy more pullets. I do have a question. I have a chicken coup but they have wore all the grass down to mud. I started letting them out to run the farm. Is there anything besides predators that I should worry about.