So new here and daughter convinced us to get ducklings. Right now soaking tub in master bathroom is brooder, thank god for pee pads. Here is my question we have foxes, Coyotes, and several other predators that would love a nice juicy duck. I have an enclosure I'm building for when they are big enough to go outside that will be completely wrapped in wire sides and top also have a partial area that will have top for sun protection. It is 10' wide and 20' long. Have a concrete pad that I can fit two of the enclosures on one for ducks with there only little pool and another for chickens. So now that I've painted the picture what bedding should I put on the concrete to protect there feet and in the there actual coop that I will secure them in at night for safety reasons. Any advice would be greatly appreciated. I was thinking deep litter system just not sure best material to use. I have no issue mucking out as needed.