Purchased this for outside use, housing 2 small Guinea pigs.  Not sure it will withstand one rain storm.  Material seems weak and flimsy and had broken "chunks" upon arrival.  Pre drilled screw holes were incorrectly positioned as well as the slots that hold the divider wall came incorrectly "pre-installed."  It will serve its purpose for the remainder of the summer, was hoping to get at least 2 summers use though.  Plus side, it's adorable once put together