I have been keeping my babies on puppy pads to help soak up the water they spill. The smell has been unbelievable!! I clean their box twice a day, and it still stinks!! A friend of mine said that she used the horse bedding pellets. These are only $8 for 40#, much cheaper than the puppy pads (I think), so I thought I would try it out. No smell, no wetness, nothing!! Just happy peeping baby ducks!! So if you are as crazy as I am, and decided to hatch ducks this winter, this is a wonderful idea!! They are made from pine, so they are not toxic. They crumble up when they are wet, but they still stay dry!! These seem to work wonderfully, just thought I would let everyone in on it!!