What Does Glucose Mean in Dogs and Cats?
Quick answer
Glucose is blood sugar, the body's main fuel. It can rise from stress, a recent meal, or diabetes, and fall with prolonged fasting, infection, or certain tumors. Cats are especially prone to stress-related increases at the vet. A fructosamine test or urine check helps confirm whether glucose is truly high.
What is Glucose?
Glucose is the sugar carried in the blood and regulated by insulin.
Reference range
[Range pending sourced table] Reference ranges vary by lab and species. Use the range printed on your pet's report.
What can raise Glucose
- Stress (especially cats)
- Recent meal
- Diabetes
- Steroid medications
- Cushing's disease
What can lower Glucose
- Prolonged fasting in small or young pets
- Severe infection
- Some tumors
- Delayed sample processing
Dogs vs cats
In dogs
Persistent high glucose with increased thirst can point to diabetes in dogs.
In cats
Cats can have high glucose purely from stress during the visit.
Why one value rarely tells the whole story
One glucose reading captures a moment; fructosamine reflects the past few weeks. Hydration, recent meals, stress during the visit, medications, and how the sample was handled can all shift a result. Vets look at the whole panel, your pet's symptoms, and the trend across tests over time.
Conventional interpretation
Vets confirm suspected diabetes with fructosamine and urine glucose.
Whole-pet context
Track thirst, urination, appetite, and weight.
Supportive options are not a cure. Check with your veterinarian before adding any supplement.
Questions to ask your vet
- Could stress explain this?
- Should we run fructosamine or a urine test?
- Was my pet fasted?
- How does this compare with my pet's previous results?
Frequently asked questions
Can stress raise glucose?
- Yes, especially in cats.
What is fructosamine?
- A test reflecting average blood sugar over several weeks.
What is a normal Glucose range?
- Reference ranges vary by laboratory, analyzer, and species. Use the range printed on your pet's report and ask your vet how your pet's result compares.
Should Glucose be rechecked?
- Your veterinarian decides based on how far from range the value is, your pet's symptoms, and other results. Trends over time are often more useful than one result.
Related lab values
Related guides
Educational support only. Not a diagnosis or substitute for veterinary care.
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