Good suggestions for relieving a muddy run. Luckily I do not have too severe a problem with mud. I have a small 4' x 8' coop and run and I have a 10' x 10' pop up tent with windowed sidewalls that I install in the winter. During the summer the tent keeps the rain off of most of the extra space under the tent that I have fenced with a portable dog fence to extend their run. In the winter the sidewalls keep out rain and snow and wind. I have a ditch dug on the high side of the run to diret and water runoff around it. What's nice is that in the winter I can sit under that tent with my flock in a drenching rain or snow storm and be nice and dry and cozy with them. The clear plastic windows lets sun in and it's actually like a little greenhouse and warm in there even on bitter cold sunny days. I do open a side wall on the east side on sunny days so it does not get too warm inside.