Surely you aren't too busy with this project to find some raisins, are you?

(The numbers on these diagrams aren't real clear, but hopefully they're legible)

You'll need 2 sheets of 4' x 8' Melamine coated pressboard.
From the first sheet cut out the following:

From the second sheet cut out the following:

Update (11/02) - It was just brought to my attention that this cut out only allows for 5 shelves, when it should allow for six. Oops! You will need to cut out one of the door frame pieces from the chunk left under the center shelf piece, then there will be room for another shelf to be cut out from the chunk under the other four shelves. Of course, you'd perhaps be better off just coming up with your own layout =).

From the 1/2" and 3/4" plywood cut out the following:
(This is the divider so only needed if you plan to divide your cage as we did. The divider itself is cut from 1/2" plywood while the divider guide is cut from 3/4" plywood.)

The measurement for the divider is ~4' 1½" x 1' 11" (it's hard to read)