Some have been known to live as long as 30 years. Chinchillas are nocturnal so are at rest much of the day. Their fur grows back, however, so this is nothing to be too concerned about. Chinchillas reach maturity at about eight to twelve months old and should not be bred until then. Gestation is generally 111 days.
Females can become pregnant immediately following the birth of a litter.
But these 'breed backs' are very draining and should only be allowed on a limited basis to females of excellent health. To prevent this from happening, the male should be removed from the cage for about seven days following the birth of a litter. Once reunited with their family, male chinchillas can make wonderful fathers. Chinchillas can have one to six kits per litter, with two being average. Young are born fully developed with fur, open eyes, and teeth.