I would also add that vets have a really tough job. Cats can't say how
they feel or what hurts. So, it is up to the vet to listen to you and
go with what they know of the typical cat. My vet often asks if a
aperticular reaction is normal or not. (Does she normally behave
quietly at the vet's office or is this lethargic for her?)

So, a different vet with different personal experiences might consider
different options.

I assume you had bloodwork since you mentioned the white blood cell
count. Did you get a printed copy of that report? If not, ask for it.

I have found that different labs give different values for standard
ranges, and you might want to look into any abnormal numbers or take it
to a different vet if you do go to one.

I recently had Kira's bloodwork done. The vet said she was fine, even
though a few numbers are out of the normal range, just barely out,
except one. But the only number noticeably out of the range was well
within the range given on a report for Maynard by a different vet. So,
a vet looking at the results will interpret the results. Mine didn't
see anything wrong with that number being out of the range. I will
accept that since she is doing fine, but I will keep track of those
particular numbers moreso than others. And now that she is older, I
will do bloodwork more often for her.