Zorana, we suspect the puppy's immune issues (Juvenile Cellulitis) were from a reaction to her vaccines, now that we have done more research.
Thankfully, she's getting so much better! She has scar tissue on the ducts in both eyes so her tears don't drain properly. It will be a surgery, once her prednisone is done. She'll be on prednisone for another couple of months. All because of vaccines.
(Unconfirmed that it is because of vaccines, but from our research it seems to be either suspected vaccine related or hereditary... And the breeder has been breeding for over a decade, owned/personally knew my puppy's parents, grand parents, and great grandparents. She carefully tracks all the litters, so knows our pup's brothers, sisters, cousins, aunts, uncles... No immune issues throughout the whole family tree. She was SHOCKED to hear what we were going through with our girl. So I will have to attribute it to vaccine, given the timing of onset)