BHB has such a large number of animals I don't think there is ever a time when they aren't busy. This is also the time when a lot of breeders are either pairing up animals or waiting for clutches.
As for the non answered emails, it could be something as simple as a sickness in the front office staff. It's amazing how having just one person out for a few days can really slow down even the most well oiled machine.
Have you tried calling BHB? If nothing else, you can probably leave them a message.