Chinchilla Mom & Baby - Chinchillas bred in captivity should be kept indoors as they can’t withstand extremes of temperature. An ideal cage size for a pair of Chinchillas is approximately 85 x 100 x 40cm. You may also consider adding a separate run in the garden or allowing your pets some daily supervised exercise outside their cage. Chinchillas love climbing, so place platforms, ramps, and perches at different heights inside their cage.