I have 12 double size critter nation style cages that I have converted into two, so to make 24 cages . I also have five double cages that I haven't converted, these are nice big cages for some of my retired chinchillas. I have about 15 old style breeder cages from a company called Thickets House these are all empty at tge moment but I use them in emergencies or when I have sick chinchillas that have been to vets so kind of hospital cages if that makes sense.