Materials: Billy bookcase, some shelves, hinges, …
Description: The cage of our rats became too small and we had problems with the old cage because of litter falling all the time. So I reused a Billy bookcase (because I bought a new bookcase) and I separate it into three parts: one part storage, one part for our young rats and a part for our adult rats.
I bought some shelves and put an edge of 5 cm attached with dowels to prevent the litter from falling. Finally I painted everything.
For the doors, I assembled boards with dowels and wood glue and I put the grate recovered from the old cage.