My coop is not quite done yet and my chicks are not in it yet. I was thinking about using pine shavings ($7 for a huge amount) so that I could easily scoop it out and into the compost pile.
I live in the city and I must drive a little too far for straw. I'm using pine shavings in their brooder right now and it seems to be working very well. The brooder is in the house and I don't smell anything nasty yet. I have 14 chicks 2 weeks old.
I was debating straw, sand, pine shavings and even kitty litter. I like the idea of kitty litter, its natural clay and easy to just scoop out the droppings, but I would not want to throw all that into the compost pile. My yard is full of clay as it is! LOL I guess I could give it a try sometimes though, it can't hurt anything.