I'm not sure if I posted this or not, so forgive me if it's a repeat..when my aussie was literally at deaths door about 4 years ago, her wbc was so low it was almost not registering, we tested for EVERYTHING, and I mean everything, at one point, some idiot vet put her on a high dose of pred (we were thinking lupus tho it came back negative) it shot her wbc up, but almost killed her...I decided to take matters into my own hands, because this dog was thisclose to death, and I didn't want to lose her,,I took her off everything, and put her on a good dose of doxy, and kept her on it for 2 months, the dog did a complete turnaround and has been fine ever since..never did get a diagnosis.
BUT I think, it was tick related and just kept coming up with false negatives, she also seems to tend to have a low WBC count, it's just "her",,
anyhow just wanted to share, and thank goodness it isn't cancer
)