Welcome! I would be happy to assist you. I am a 2003 graduate from UC Davis and a Medical Director of a veterinarian practice.

Hello,
Well, if the vet only tested blood sugar, that is not ideal!

So many super common conditions can cause increased water intake.
You need to know if they did a regular blood test and urine test.

In particular, I am concerned about:



-Hyperthyroidism (overactive thyroid)

-Acute Kidney Failure
-Chronic Kidney Failure

Diabetes is not even as common as the above named conditions. In fact, a urinary tract infection, is also a common cause to cause to a cat to drink more water.

Taht being said...heart murmur...well, if its is a grade 1, 2 or 3, it is not as important as doing regular blood and urine testing for the above conditions.

Also, cat cardiologist? You must be referring to a regular cardiology specialist.
Unless the murmur is very loud and the vet is worried about congestive heart failure, your focus should be on:

A feline basic blood test (with a thyroid level) and a urine test (urinalysis) may answer a lot of concerns, or at least rule-out many possible explanations.

What can tests tell you:
Chemistry Panel
CBC (complete blood count)
Urinalysis

Good Luck
Dr. Andy


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