The news isn't good. :( The vet thinks Onyx has a tumor on her thyroid. Her bloodwork showed high levels of calcium and pretty normal levels for everything else. Her talked with specalists from internal medicine and they thing that the tumor is the best explanation. He is coming out again on Monday to take another blood sample and test it further. If it does end up being a tumor, the only "fix" is surgery.
Not only can I not afford thousands of dollars of surgery, but how can I justify putting a 27 year old mare through that kind of stress? I don't know what to do and this is what I was most afraid of.