Hey all. I purchased my first chicks this weekend, and I'm very excited to try my hand at raising my own chickens. I grew up in the city, so this is all new to me. I live in Portland, OR, so it rains a good amount with some snow in the winter. The coop/run will be placed on compacted dirt. I've researched quite a bit so far, but I wanted to directly ask for some suggestions for a material to lay down in the run. Thanks.