You might try asking the people at the Bradley Hills Animal Hospital (
www.ferretdoctor.com). The guy is a vet, but he's pretty full-service, so he might be able to recommend somebody to you. (The guy's got everything - for example, he's one of the 2% of vets equipped to perform laser surgery rather than the traditional scalpel & stitch method. He also has separate waiting rooms for cats and dogs so that they don't stress each other while they wait.)
It seems to me that there's never anything
in DC, but there's almost always what you're looking for somewhere
around DC if you look hard enough.
By the way, if you decide to change the vaccination regime, make sure to check DC law first. The place is run by liberals, so I'm sure there are a few dozen regulations about mandatory vaccinations.
Lexis (pet refuses anything but kibble) T.