Quote Originally Posted by IRescue452 View Post
Don't forget to seal the wood well or to line it with some sort of plastic. I would do both. Use a sealant and then use plastic drawer liners with the sticky back to do the entire inside. Otherwise you work will be in the garbage in a few months.

What are the dimensions of the bookshelf? You don't want it to be thinner than 12" minimum, the rats shouldn't have to bend their necks or tail to fit when they turn sideways or they can end up with permanent issues.
The wood is already sealed, and we are also lining it with Shelf liner. The shelves are 16" deep, and range from 14-18 inches high.

We got the doors installed yesterday evening. I alo sewed together some Rat hammocks out of fleece. Today we will be cutting the holes in the shelves and installing the ladders. Besides adding toys and such, we should be done today. Pics will be added later.