Make your chinchilla's cage bigger.

Step 3 Finishing touches

I had to cut a hole in the top of the existing cage and cut a corresponding hole in the luan which I wired down to the top of the cage.  I fastened the existing wire cage to the uprights using Mod Truss screws and fender washers.   I also threaded a very light gauge wire through the chicken wire onto the existing cage.  this would keep him from being able to get through and would help hold the new structure to the old.