Hello! I'm adopting two young female Guinea Pigs on Wednesday and am planning on creating a DIY cage. I'm basing the cage off of a bookshelf. It's 71 inches tall, and the width of each shelf (total of 5) is 29 inches. However, the depth of it is 11 5/16 inches. I plan on making the top three into a cage with ramps. Will this be too small?
Here's the link to the bookshelf: (broken link removed)
Here's the link to the bookshelf: (broken link removed)