Why does my cat's report have so many values?

Because a panel is built to cross-check itself. A full feline panel usually combines a complete blood count - the red cells, white cells and platelets - with a chemistry screen that samples the kidneys, liver, electrolytes, protein and glucose. No single value is conclusive, so the laboratory reports the whole group and your veterinarian reads them against one another.

Should I worry about every value that is flagged high or low?

No. A flag only means the result sits outside the reference interval; it does not grade how serious it is. A value a fraction outside the range in a bright, well cat is read very differently from the same flag in a cat that is unwell, and several markers nudging in the same direction usually matters more than one isolated flag.

Why is the reference range on my report different from one I found online?

Reference intervals are specific to the analyser and method each laboratory uses, so they shift slightly between labs. The range printed next to your own cat's result is the one that governs its interpretation, which is why a number copied from elsewhere can be misleading.

Can my cat have a normal-looking panel and still be ill?

Yes. A blood panel samples certain organ systems but not all disease, and some conditions show up on imaging, urine testing or a physical exam rather than in blood. A clean panel is reassuring, but it is read alongside how the cat looks and behaves, not as a guarantee.

Why did my vet draw blood when my cat seemed fine?

Cats are skilled at masking illness, and a baseline panel can reveal early shifts before signs appear - which is why senior cats are often screened on a schedule. A result read against the cat's own previous panels is more informative than a single snapshot taken only once a problem is obvious.

Does stress affect a cat's blood results?

It can. A stressed cat can show a transient rise in glucose and a shifted white-cell pattern, which is one reason your veterinarian interprets the panel together with the visit itself rather than treating each number as fixed. A surprising result is sometimes rechecked once the cat has settled.

What usually happens after an abnormal panel?

It depends entirely on which group is abnormal and how the cat is doing. The next step might be a urinalysis to pair with the kidney values, a thyroid check in an older cat, imaging, or simply a recheck to see which way a borderline value is trending. The panel points the direction; it rarely ends the investigation.

Should I keep copies of my cat's blood panels?

Yes. The trend across repeated panels is often more telling than any single report, because a value drifting within or toward the edge of the range can be an early signal. Keeping your cat's results lets your veterinarian compare like with like over time.

Should I keep copies of my cat's blood results?

Yes, and they are more useful than most owners expect. Many values are far more informative as a trend than as a single reading, so an older report lets your veterinarian see whether a figure has moved, and how fast. Keep the full report rather than a summary, because the laboratory's own reference intervals are printed on it.

Does it matter that my cat was stressed during the blood draw?

It can. Struggling, travel and restraint can move glucose and the white cell picture, and a difficult draw can affect other values through cell damage in the sample. It does not make the panel useless, but it does mean an odd-looking value is often repeated under calmer conditions before it is treated as real.

Cat blood panel — complete report reading guide

Quick Answer:A cat blood panel is not a list of pass-or-fail numbers – it is a set of organ-system groups that are meant to be read against one another. The kidney markers, the liver enzymes, the electrolytes, the proteins, the glucose and the blood cells each answer a narrow question, and the meaning emerges from the pattern across them. The reference range printed on your own cat’s report is the one that counts, because intervals shift between laboratories. And a single flagged value matters far less than how it sits beside the rest of the panel and how the cat actually looks.

Wondering what a full interpretation looks like? See a sample report →

What a Cat Blood Panel Is Actually Made Of

Veterinary care for a cat — Understanding your cat’s blood panel is crucial for maintaining their health and well-being.

A standard feline blood panel is really two tests reported together. The complete blood count, or CBC, looks at the cells themselves – the red cells that carry oxygen, the white cells that respond to inflammation and infection, and the platelets that help blood clot. The serum chemistry screen looks at what is dissolved in the fluid the cells float in: enzymes and waste products that report on the kidneys and liver, the electrolytes that keep cells working, the proteins, and the glucose. Seeing both at once is the point. The cells and the chemistry cross-check each other, so a finding in one group can confirm, soften or redirect the reading of another. That is also why no experienced clinician scans the page for the single worst number – the report is designed to be read as a whole, and a practical walk-through of the common abnormalities follows exactly that logic.

Understand your cat’s blood test results →

AI interpretation grounded in clinical references · 12 species supported · from $29.99

Why the Reference Range on Your Report Is the One That Matters

Every value on the panel is printed next to a reference interval – the band of results seen in a population of healthy cats. A result is flagged high or low simply because it falls outside that band, and that flag is the start of interpretation, not the end of it. The interval itself is specific to the analyser and method a given laboratory uses, so the numbers drift between labs. A figure quoted from a website or from a different practice can therefore be misleading; the band beside your own cat’s result is always the final word. The verified feline values in this guide come from one analyser and method, listed only so you can see the kind of figures involved.

Parameter	Verified feline reference range
ALT (liver enzyme)	28-109 U/L
ALP (cholestatic enzyme)	11-49 U/L
Total bilirubin	0-0.1 mg/dL
BUN (urea)	17-35 mg/dL
Creatinine	0.8-2.1 mg/dL
SDMA	0-14 µg/dL
Total protein	6.6-8.4 g/dL
Albumin	3.2-4.3 g/dL
Globulin	2.9-4.7 g/dL
Glucose	71-182 mg/dL
Calcium	9.0-11.3 mg/dL
Phosphate	2.6-5.5 mg/dL
Sodium	149-158 mEq/L
Potassium	3.8-5.5 mEq/L
Hematocrit (HCT)	31-48%
White cell count (WBC)	5.1-16.2 x10^3/uL
Platelets	195-624 x10^3/uL

See the full reference intervals for the cat — every value cited to the laboratory document or paper it came from.

Even with verified figures in hand, the numbers above are reference points, not verdicts. The reading always returns to the cat’s own report and the cat in front of the veterinarian.

Reading the Panel in Groups, Not in Lines

Veterinarian examining a cat during a checkup — Reading a cat blood panel effectively means looking at the markers as organ-system groups rather than as a list of isolated numbers.

The fastest way to make sense of a crowded report is to stop reading it top to bottom and start reading it in clusters. Each cluster answers one question, and the markers within it support or check one another. The table below is how a clinician mentally sorts the page before drawing any conclusion.

Group	What it samples	How it is read together
Kidney markers (BUN, creatinine, SDMA)	How well the kidneys are filtering, and hydration.	Creatinine and SDMA both reflect reduced filtration; BUN also rises with dehydration or a high-protein meal, so it is read against hydration and the urine.
Liver enzymes (ALT, AST, ALP, GGT, bilirubin)	Whether liver cells are leaking, bile flow is impaired, or jaundice is developing.	ALT signals leakage from liver cells; ALP and GGT point to impaired bile flow; bilirubin shows whether the cat is tipping toward jaundice.
Electrolytes (sodium, potassium, chloride)	Fluid balance and how cells are functioning.	Sodium reflects water balance relative to salt; potassium ties to kidney excretion and acid-base state; chloride usually tracks sodium.
Proteins (total protein, albumin, globulin)	Hydration, liver output, loss, and immune activity.	Albumin reflects liver production or true loss; globulin reflects inflammation or immune stimulation.
Blood cells (CBC)	Oxygen-carrying capacity, immune response, clotting.	A low hematocrit means anemia; the white-cell pattern reflects inflammation or stress; platelets relate to clotting.

The Kidney and Liver Lines Owners Notice First

Portrait of a cat at a veterinary clinic — Interpreting a cat’s blood panel can be challenging for pet owners, especially when trying to understand what the numbers mean for their pet’s health.

Two clusters tend to draw the eye first because they come up so often in cats: the kidney markers and the liver enzymes. With the kidneys, creatinine and SDMA both rise when filtration falls, and reading them together is more reliable than reading either alone – SDMA is regarded as an earlier signal of reduced kidney function, which is why a raised SDMA draws attention even when other values still look acceptable. Because chronic kidney change is so common in older cats, persistent shifts here are taken seriously and graded carefully, a process set out in the IRIS approach to feline creatinine. BUN sits in the same group but is less specific, since it also climbs with dehydration or after a protein-rich meal, so it is always weighed against the cat’s hydration and, ideally, the urine.

On the liver side, ALT is the leakage enzyme – a rise tells you liver cells are injured, not why. ALP and GGT report on bile flow instead, and in cats ALP carries particular weight: it has a short half-life, so even a modest increase is meaningful and points toward cholestasis rather than the bone activity it can reflect in growing animals. Bilirubin completes the picture by showing whether the cat is moving toward jaundice. None of these enzymes name a diagnosis on its own; they describe a direction of injury that the rest of the panel and a physical exam then refine.

The Quieter Markers That Reshape the Reading

The values owners skip over are often the ones that change a clinician’s interpretation. Protein, electrolytes, calcium and glucose rarely make a headline by themselves, yet each can tilt the meaning of a more obvious abnormality. The table below shows how these supporting markers earn their place on the panel.

Marker	What an out-of-range result can reflect	Why it changes the wider reading
Albumin and globulin	Albumin falls with reduced liver production, true loss, or inflammation; globulin rises with inflammation or immune stimulation.	The split between the two reframes a low total protein and can point toward loss versus immune activity; true renal loss is confirmed on urine testing, not by the kidney values.
Calcium and phosphate	Calcium shifts with several systemic processes; phosphate climbs when the kidneys excrete less.	A raised phosphate alongside high kidney markers reinforces a renal picture rather than standing alone.