We just fenced in a 12 x 24 run, attached to a secure coop. Right now it is a mixture of snow and dirt from the fence installers, who are just finishing up. Chickens get out tomorrow. What should I get in the run to start a good base. I was thinking dumping in 3 or 4 bags of pine chips from TSC for starters. Then add some woodsy type stuff this spring, leaves, pine cones, sticks and stuff. Suggestions appreciated!!