Common clozapine blood test fluctuations?

Anyone have information on how their neutrophil numbers were reduced by clozapine? What would be considered OK reduction?

Son was doing very well with clozapine 200mg , but twice the dose was lowered to 175 when the ABN went from 3.0 to about 2.6 over several weeks. Not sure if Dr. is being too careful with Clozapine?
( current medications are clozapine 175 and zyprexa 10mg, results are only fair)

We know clozapine is a dangerous drug, but the blood test numbers were always within the dispensing guidelines- The dr. did not want the ABN number to be below 2.6 which is higher than the guidelines.

Thanks for any information.

A psychiatric doctor being too careful with dosages of drugs? That would be a first in my experience!