What kind of bedding do you use for your ducks?

[Hmcopen]

For my two pekin ducklings I have been using pine shavings for bedding but it seems that they were somehow getting cut on the back of their legs from it. I put some neosporin (without pain releif) and it seems that they healed! I currently built a duck house for when they are ready to live outside. But I’m not sure what bedding to use! I use pee pee pads in where they are staying now but that won’t work for much longer. Any recommendations? Is hay better? Thanks!