there are cross species mites. the most common reptile mite is Ophionyssus natricis and they will feed on snakes and lizards alike. i would make sure sure sister gets a beardie from a reputable source. essentially keep it in QT for 30-90 days so hopefully she has a separate room, u can keep it on white paper towel substrate to monitor for mites and other issues. i also treat my new snakes w/ Natural Chemistry Reptile Spray when they arrive but it's nit necessary. a good vendor, QT and proper husbandry will do the most work.