Pine smells so wonderful, and many people (including me) have used it for years. But there is evidence that it is toxic. Check out the thread, Pine Shaving Toxic to Chickens. Now I use sand and wonder why I didn't start using it 44 years ago with my first chickens!!! It's sooooo much cleaner and easier to keep clean.
I get free river sand from our desert, but even if I bought it, I wouldn't put it all in at once. I keep a thin layer (maybe 2 inches) and add 2-3 shovelfuls each week, and every couple of months I replace it all from the the sandpile behind the barn.
And I would never use a cat scoop, even on my tiny night coop--I tried it once and said, Phooey to this! and built a screen. I rake with a small rake, then use a dustpan to pour it onto my screen. Then I dump the poop into the compost pile.
It takes me about five minutes every morning to clean (and it's so easy, often I clean before their bedtime, too.). The sand is always dry and without smells. It is coarse enough to not raise dust except when I put the new sand in. And even then, I can eliminate the dust if I shovel it in at ground level instead of throw it in.
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