The instructions for this enclosure are terrible. Look for lines drawn on the sides of the house. You’ll line up the front of the building on that line, not at the edge. Then the side panel for the yard will be on the other side. It makes sense when you look at the picture but we didn’t even notice the lines until we had already put it together wrong. 

There are no holes drilled and I highly recommend you be ready to do that. I suspect the wood would split badly if you don’t. 

We got this for our guinea pigs and they love it. It’s a nice big area for them to play in and it seems really secure. We bring them inside at night and if weather get’s too hot or stormy. Other than that, we’re comfortable leaving them in it while we run to town and don’t worry that anything will get in.