Mixed results from the sold block bedding, on the plus side, they are small, so very handy if storage is tight, but rehydrating is a bit of a chore, especially when you don't want it to be damp.
So it took a lot of chipping, sawing ( this stuff is brick hard you can't break it up with your hands ) and adding a bit more water until I had a heaped barrow full, and then one of my cats jumped in and pee'd in it !
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Two blocks filled my 5x 4 coop to about four or five inches deep, I'd use it again, but in the summer, it's too cold to be hunched over a wheelbarrow for ages with your hands in cold water.