That sucks!! Mites are awful, but on the bright side they are relatively easy to kill.

Your whole situation with BHB was pretty messed up! The problem with big breeders with that is that they have so many animals moving through their facility and so many people working in, and visiting it that it's very difficult to address. I don't think there is a good reason for sending someone an animal that has anything wrong with it, mites included - but in their defense, its one of those things that sometimes happens..

Godluck!