I am sorry to hear about your girl's problems.
My biggest question is that with your first veterinarian, when surgery was performed, was the mass submitted for pathology?
That is really where I believe the answer needs to come from to get an answer. Are these cysts (which would be my suspicion), or are the tumors of some type? A biopsy will give those answers.
If that hasn't been done, I would have it done soon, and ask your vet to make sure the samples are submitted to veterinary dermatohistopathologist. It's a big, fancy word, but it means someone who specializes in skin lesions.
When she was on systemic antibiotics, which ones were they? And how long and how frequently were they given? You might be surprised how often doses are given too low or too infrequently or even too short of a period of time to be effective.
I hope this helps!
As always, if you have further questions or concerns, please don't hesitate to ask them using the "reply" function.
Hello again Amy,
I would put a call in to that office and see if you can get a copy of the pathology report. If this is a cyst of some sort, then it truly is not something to worry about, unless they get infected.
Having said that, dogs who get cysts can start to get more and more of them (as you have seen). If this is the case, it may be that there is truly nothing to do unless the lesions get infected or you want to have them removed each time they show up.
Likewise with the antibiotics, if you can get some more information, I am happy to give you my impressions.
I will be available for further questions and follow up once you get that information from the vet if you would like my input.
You are welcome, let me know when you have some more information.