Since there has been a marked improvement since starting pergolide, I would say that the owner can quite safely stay on pergolide for now. If there will never be any testing done, it becomes a little harder to know what dose of pergolide will work for this horse;
Neo is eating posts! This may go through twice.
I'd like to know how in the heck you were able to get pergolide from a vet who is clueless about these things! Pretty amazing.