Oh poor Peanut! I'm so sorry that I don't have much advise to offer as I haven't dealt with this before. Speckles has a small lump on her neck that looks like acne but it's been there for the last 4 years and the vet said it is OK. I do hope you get some answers and Peanut is back to normal. Prayers are on the way for the 3 of us.