Exotic Emergency Vet in Houston?

After much google searching I am still having a hard time finding an Emergency vet that handles exotic animals in Houston. Does anyone know a good emergency center for exotics that handles small mammals (guinea pigs) in Houston? I have already taken her to the vet and she has a URI and has been on Antibiotics but is getting worse, not better. Her vet is closed today and I really would prefer to get her in somewhere today. Please leave the trolling at the door and only reply if you actually know an emergency vet that handles exotics in the Houston area. I am willing to drive pretty much anywhere in town to get her to a vet.