Only vet now that will even see a rat is Dr McGowan in Hampton (15mins outside the city)
I have called them all and no one will even think about it. McGowan is good though, she has been my vet for 12yrs with my dogs and cats and when I took the rats in for resp issue last year she was well versed in the proper meds and dosage, and when we needed some advise for the Bearded dragon she contacted a collegue in southern states specialized in reptiles for advice.
However her partner Dr Malone hates rats and will tell you this I would never ever take them to her.