There are a number of good local Vets but only one emergency Vet. The emergency clinic is in Niceville a couple miles on the left past the regional airport at Eglin AFB on 85 just before you go down the hill. They don't have a web page, but here is their address and phone...
212 Government Avenue, Niceville, FL 32578-1863
(850) 729-3335
We took our dog, Max, there once for an ulcer on his eye. They were great and not too pricey for an emergency clinic.