I believe Nashville Veterinary Specialists is excellent for emergencies and if you need a specialist.
Nashville Veterinary Specialists and Pet Emergency Service
Here is another vet. highly recommended especially with small animals-
Catrina Herd, DVM 615-834-6441
I have not met any of these vets myself but do plan to met them prior to letting my dad have any extended visits with my furbutts. They need a great doctor like an kid needs
I hope you find a great vet.