She and another Chinchilla that I "rescued" have been eating Purina Show Rabbit food for at least 10 years now. I don't know what else to offer but I do believe it really comes down to genetics. She came from Maryanne Holden in Encinitas and has a curly tail, like dwarves do, but isn't a dwarf. She did have a dwarf baby once though, which unfortunately did not live that long. She has had 5 kits over her lifetime, the last must have been 16, 17 years ago.