Kidney values in dogs
A high creatinine isn’t a diagnosis — staging needs two draws. What to track at home, and what to ask your vet.
Your veterinarian mentioned your dog’s kidney numbers, or you are holding a panel with BUN and creatinine on it. These values are usually read together and alongside urine, not one at a time.
BarkLens keeps each result with the range printed on its original report and places repeated draws into one history.
BarkLens doesn’t diagnose. Your vet does.
What the markers measure
BUN is a waste product the kidneys help clear. It can also move with hydration, diet, and gastrointestinal bleeding, so one result has limited context.
Creatinine is more specific to filtration but is affected by muscle mass. SDMA is less affected by muscle mass. Urine specific gravity shows how concentrated the urine is.
Why urine changes the conversation
Raised waste products mean something different when urine is concentrated than when urine is dilute. This is why a veterinarian may ask for a urine sample beside the blood panel.
Source · Cornell eClinPath, concentrating abilityWhat is read together
IRIS guidance stages chronic kidney disease using fasting creatinine, fasting SDMA, or preferably both, then adds protein in the urine and blood pressure.
Phosphorus, calcium, potassium, red blood cells, medications, hydration, and the dates of each result can add context to the same conversation.
Source · IRIS staging guidelinesA practical plan
Build the kidney conversation
Put these four parts together before the next appointment.
- The latest BUN, creatinine, and SDMA results
- Urine concentration and urine protein results
- Blood-pressure readings and medication changes
- Questions about what changed between draws
Questions worth asking
Bring the next question, not just the latest number.
- Which value matters most in my dog’s case?
- Is a urine sample or blood-pressure reading missing?
- Could hydration, diet, muscle mass, or medication affect this result?
- When should these values be repeated?
Published veterinary sources