Chinchillas are clean, quiet and attractive rodents that don't smell. They can live for 10–20 years, so are a long-term commitment for any owner. They're quite shy, flighty and don't enjoy being stroked or handled. Because of this they are more appropriate for adults than children, and also best for owners who enjoy watching animals instead of handling them. These soft-furred rodents originate from the barren, rocky slopes of the Andes mountains of South America, where they have been hunted for their pelts to near extinction. They've also been bred and farmed for their soft, dense fur. They have long, strong hind limbs adapted for leaping, and a tail that makes up about one-third of their body length. They can jump over six feet (1.8m) in height, and pet chinchillas have been reported to jump onto the top of refrigerators! Wild chinchillas eat leaves, stems, bark and seeds. Captive chinchillas need a high-fiber diet based on grasses and hays. Their teeth grow constantly, so they need to eat lots of hay, which is abrasive, to help wear their teeth down. Chinchillas feed in the early morning and late evening, but should have access to food 24 hours a day. They eat by sitting on their haunches, holding the food in their forepaws. Chinchillas are nocturnal, meaning they're most active in the evening and at night. Chinchillas do not burrow, but live in rock crevices or holes in the wild. As a result, chinchillas will sleep while squeezed into very small spaces. They usually sleep upright in a huddled position, but will also sleep on their sides and can even sleep upside down!