Teeth can overgrow fairly quickly if a pig is not eating/chewing normally to wear them down. Dental issues can be due to a congenital issues, but can also be due to other factors (i.e. tooth abscesses causing uneven wearing of the teeth, food that isn't sufficiently coarse to allow normal wear, etc.) I've never heard of any particular breed being more prone to malocclusion, though it may run in individual family lines if teeth do not line up properly. However, with a problem developing at 2 years, I would not guess it's a congenital problem present at birth, as that would have showed symptoms a lot sooner. I've had two pigs with malocclusion issues, two different breeds (one aby and one short-haired.) In both of my cases, the malocclusion was secondary to abscesses in the jawline, so be sure the new vet assessed for masses that could represent infection along the jawline. However, it is possible for malocclusion to exist without an abscess. In North America, your piggie's molars will most likely be filed under a general anesthesia, as most vets here do not do dentals without anesthesia. She may be groggy after surgery and may have to stay at the vet for several hours until she is more awake. Some pigs will resume eating after a dental on their own, others don't and will need syringe-feeding. Hope this helps a bit... lots of luck!
