I bought this for my guinea pigs who really like it. They are running up and down the ramp and enjoying their new "2 story" home. However, the pieces aren't labeled well, or pre-drilled. I would not consider this water proof if you're actually going to use it outside for chickens. I have it inside my cavies so it works. Also, it has a very pungent odor. Let it air for a while before using it or you'll pass out from the fumes.