I second this. Even an exotics vet will not be specialized in BP's. They usually have general knowledge of everything from monkeys and parrots to iguanas. You'll probably leave disappointed. Nobody will have more experience sexing hatchlings than an experienced breeder. They will be able to tell you if they seem healthy as well.
Of course, if they have obvious health problems, do not hesitate to take them to a vet immediately. Time is the most important variable when it comes to saving a sick reptile.