It really does get kind of sad with what chinchillas can’t eat.  You feel bad for them with their inability to process fatty foods very well, as that means no burgers for them and then it gets into vegetables and fruits potentially causing bloat or dried fruits causing diabetes in the long run.  It’s a good thing they’re adorable!  If the naked mole rat were petitioning for the role of pet and had those problems, they’d be extinct so fast you couldn’t say “later, you weird lookin’ rodents”.