I have to say that The Chicken Chick has a whole article on soaking chicks toes to get cemented manure balls off of chicks feet so they won't be injured and she is a big advocate of sand in the brooder and in runs. After my debacle with my quail chicks you can read about in a previous post in this thread. I took the sand out of the same brooder with the same amount of chicks and put shavings in and have had no problems, none. My chick with the gangrenous toe due to manure balls is still alive but I'm hoping it will just fall off and not spread higher on the foot. Maybe sand is better for poultry in the run when they are fully grown, IDK, but what I do know is I would never put my flock at that kind of risk again.