Vets in. Mexico may not be as well trained as those at home . We have seen several cases of misdiagnosis and just plain lack of knowledge over the Years!
It is much harder to treat animals than it is people. dogs can't talk nor can Horses or Pigs!
This despite some owners who think that they can read minds!
I have walked out of more than one Dental Office and even a Doctors Clinic due to My own observations as to cleanliness etc. your Poor Pooch doesn't get that choice!