Quoting RonniG:" Honestly, I would think of an ulcer on her eye as an indication of more health problems to come. While ... [snip!] ... you find out where the puppy came from in the first place. Often pet stores get their puppies for over crowded puppy mills."
Oh I know this is most likely a puppy mill dog.
We talked to our vet, he said that as long as the eye is treated correctly that it shouldn't be a problem and it wouldn't make her anymore likely to get another one than any other pug...and that pugs are just susceptible to the eye ulcers because of how far out their eyes sit. He didn't seem to think it was a major concern for the future.