you & Basho have ours too. I always read the purr requests and comply, even
when I don't post about it.

That small an elevation of an enzyme is nothing to worry about.  When
there is significant disease, you see massive elevations, into the
hundreds or even thousands (the latter mostly with creatinine
phosphokinase).  Without other elevated enzymes, an especially cautious
clinician might repeat it immediately, or even in a few months.  If the
AST and/or alkaline phosphatase (other enzymes) were also elevated, that
would be a little more grounds for concern, as would be elevation of
bilirubin.

BUN and creatinine, the latter especially, are more a matter of concern.
Unless they are quite high, however, it's often best to wait and repeat.
For example, I had routine tests of these when I went on a new
anti-diabetic medication. We concluded that I couldn't take the drug,
metformin, because the creatinine was steadily going up, sometimes only
a unit or fraction, but steadily over several weeks.  Stopping the drug
and watching the BUN and creatinine return to normal proved that was the
problem, although we may try it again starting from an extremely low
dose -- it had lots of beneficial effects.

With hoomins, the most definitive creatinine measurements involve some
computations both with blood creatinine and creatinine in a 24-hour
urine sample. What is really clinically important is the rate at which
creatinine is excreted. Since it's not practical to get a 24-hour urine
from a cat, a little more invasive technique is used: take one blood
sample, then inject a known dose of creatinine through the same needle.
Measure the blood creatinine before the additional dose was given.  Wait
a timed period, and take another blood creatinine.  The difference
between the two, given a known load to challenge the kidneys, gives the
clearance rate.

I'd have to see the electrolytes; there are four values, sodium,
potassium, chloride, and bicarbonate. Often, the ratios among them are
more important than the specific values. Having them all low would be
extremely rare.

I can think of only one case where a hoomin managed to test with all
four below normals, and, in that case, the sodium was much lower than
the others. This was my first wife's trip to the emergency room after
she became faint from what turned out to be overdosing on iced tea.  It
was a very hot day and she drank several gallons.  Tea and coffee do
have a slight diuretic -- accelerated sodium and sometimes potassium
excretioon -- but she really overloaded on water more than anything
else.  She needed a couple of liters of IV fluids with added potassium
and sodium, and for everyone to stop laughing at her.

Very few people manage to turn iced tea into a drug of abuse.