I'd have to agree with everything said here. I always wanted one because I thought they were so cute, and then after working at the humane society and being around more of them they really didn't seem very friendly. I'd really recommend getting two young female rats. They are great small pets.First, how old are the girls?
Chinchillas, in my opinion, are not good pets. They are very sensitive and high maintenance. Also, they are not cuddly pets, and do not like getting handled. Even ones who have been handled from a very young age by a devoted breeder. And if you think other animals chew, then you haven't met a chinchilla. My former housemate, his chinchilla chewed EVERYTHING.
Also, they can teleport. Which greatly assists with the chewing. A list of things ruined include a window air conditioner, countless sets of headphones, books, socks, chairs, window edges, cords, and basically anything you wanted intact. Normy did make a great paper shredder, so when anyone got credit card offers in the mail, we gave it to the chinchilla. He reduced those letters to confetti in minutes.
I'm serious. Not a pet I'd recommend unless you can chinchilla proof an entire room. They do need a lot of exercise, and even with a big cage, they should get 'outside' time.