[header] How to set up a chinchilla's cage [title] Choose the right cage. [substeps] Chinchilla cages must be well ventilated to keep the chinchilla cool, thus making metal wire mesh cages a good option. However it's of note that it's easier for the chinchilla to knock messes out of their cage and onto the floor with a wire cage. 
Closed back/sided cages are fine options as long as they are well ventilated. Cages are recommended to be at least 3 x 2 x 2 feet.