What does low urine specific gravity mean?

Low urine specific gravity means the urine is more dilute than normal, with a higher water content. This can be linked to excessive water intake, kidney disease, or hormonal conditions such as diabetes insipidus or hyperadrenocorticism. Further evaluation with a urinalysis and blood tests is needed — consult your vet.

How does the vet investigate low urine specific gravity?

The vet will perform a urinalysis to measure specific gravity, examine the sediment under a microscope, and may send a sample for culture. Blood tests and imaging (ultrasound or X-ray) are used to identify the cause, with follow-up arranged based on the results.

What records can I keep at home to help with diagnosis?

Track daily water intake and urination frequency, take photos or video of your pet urinating or of the urine, bring a fresh urine sample collected within 24 hours, and compile a complete medication history — all of these help your vet make a faster and more accurate assessment.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Low Urine Specific Gravity in Dogs & Cats: Symptoms, USG Testing & Care Guide [2025]

Low urine specific gravity indicates the kidneys cannot concentrate urine, and may be caused by kidney disease, diabetes mellitus, Cushing's syndrome (hyperadrenocorticism), or diabetes insipidus. Further testing is needed to identify the underlying cause.

Take 1 minute to check the symptoms first

Last updated: 2026/01/17

Pethealthmap Editorial Team

Sources: ACVIM, IRIS, National Taiwan University Veterinary Hospital

When to See a Vet

Seek Emergency Care Immediately

•Sudden complete inability to urinate or total absence of urine
•Persistent large amounts of fresh blood or visible blood clots in the urine
•Severe and persistent lethargy or repeated vomiting

Schedule a Clinic Visit Soon (within 24–72 hours)

•Noticeably increased water intake with frequent urge to drink
•Significantly increased urination frequency
•Urine appears very dilute and pale in color

01What Symptoms Indicate a Problem?

Low urine specific gravity typically presents as changes in urination and drinking behaviour, with dilute, pale-coloured urine that may be accompanied by changes in energy levels or body weight. The following outlines common signs and emergency symptoms to watch for.

Noticeably increased frequency of urination
Significantly increased water intake and constant thirst
Dilute, pale-coloured urine produced in larger volumes
Changes in energy, appetite, or activity level
Occasional weight changes or urinary incontinence

Seek emergency care immediately if you notice the following symptoms:

⚠️ Sudden complete inability to urinate or no urine output at all
⚠️ Persistent large amounts of fresh blood or visible clots in the urine
⚠️ Severe and persistent lethargy or repeated vomiting

02How Can You Assess at Home? Key Observations & When to Seek Emergency Care

Observing and recording key information at home helps your vet quickly understand your pet's condition and arrange appropriate tests.

Track daily urination frequency and timing
Estimate or measure and record your pet's daily water intake
Monitor changes in energy, appetite, and activity level
Take photos or video of your pet urinating or of the urine for reference
If you notice anything unusual, arrange a vet visit as soon as possible

03How Does the Vet Diagnose the Problem? Common Diagnostic Tests

At the clinic, the vet will perform a physical examination and laboratory tests, with further imaging or cultures arranged as needed.

Physical examination

general health check, dehydration assessment, and abdominal palpation

Blood tests

to evaluate kidney function, electrolytes, and related parameters

Urinalysis

measuring urine specific gravity, sediment examination, and microscopy

X-ray or ultrasound to assess the urinary tract and kidneys

Urine culture to rule out or confirm the presence of infection

Referral to a specialist hospital with advanced imaging if needed

04How Is It Treated and Managed? Medications, Diet & Home Care Guide

Treatment and follow-up will depend on the underlying cause identified — regular recheck visits and monitoring are important for assessing the prognosis.

Treatment tailored to the underlying cause: medication, dietary changes, or fluid support
Continue recording water intake and urination patterns at home
Follow up as directed to monitor urine specific gravity and blood results
Further blood tests or imaging arranged as needed
Long-term monitoring of symptom changes and disease progression is required

05What Should You Prepare Before the Vet Visit? Key Steps to Help Your Vet

Write down when the symptoms started and how they have changed over time

Bring your records of daily water intake and urination

List all current medications and supplements your pet is taking

If possible, bring a fresh urine sample collected within the last 24 hours

Bring photos or videos to illustrate any abnormal behaviour or urine appearance

Choose a clinic that is equipped to perform urinalysis

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.