For hatchers a week old or under, I use puppy pads with shelf liner on top to help prevent splayed legs. I also use a small paper towel under their feeder for the first couple of days so any feed that spills out will be easily seen. After the first week or so, I start using a thin layer of large flaked pine shavings, but continue with the puppy pads under this so I can keep a close eye on poops. I use puppy pads underneath bedding throughout the entire time with waterfowl
Edited to add: I go through A LOT of puppy pads and shelf liner.