What do you feel is the best base to put in a run? Right now we just have dirt and I have put down shavings occasionally. Our chickens are out free range on four acres during the day and only locked up at night or when the weather is so bad they don't want out. However, when it has been snowy or rainy, I am getting really dirty eggs and would like to put something down that is healthy for their feet and will help keep the eggs clean. Then hen house has a wooden floor covered in about 2 inch deep shavings.