Stressed chinchillas will be unhappy and more susceptible to disease. If the cage is in a busy area, covering it with a thin cotton cloth during the day may help. Finally, be sure there are no electrical cords or wires, or other dangerous items near the cage. Your chinchilla could reach through the cage and start to chew on them. When it comes to cage size, basically, the bigger the better.
Chinchillas are very active, have a lot of energy, and love to climb.
The more room she has, both horizontally and vertically, the happier your chinchilla will be. A 6x6x3 foot cage would be ideal. Cages with multiple stories , often referred to as condo cages , allow your chinchilla to move in many directions and are recommended. Ramps lead from one floor to the other. If your cage does not have multiple levels, a shelf high up in the cage, with a ramp leading to it, should be provided.