Urinalysis in Dogs and Cats
What is a Urinalysis?
A urinalysis is one of the most common and valuable diagnostic tests performed in veterinary medicine. By evaluating a urine sample, veterinarians can gain important information about kidney function, hydration status, metabolic health, and diseases affecting the urinary tract.
Because urine is produced by the kidneys and influenced by many different body systems, abnormalities in the urine can sometimes provide some of the earliest clues that a medical problem is developing. In some cases, changes may be detected before abnormalities appear on bloodwork or before obvious clinical signs develop.
For this reason, urinalysis is frequently used both as a screening tool and as part of a more comprehensive diagnostic evaluation when pets are sick.
What Does a Urinalysis Evaluate?
A complete urinalysis includes three main components: physical evaluation, chemical analysis, and microscopic examination of urine sediment. Each component provides different information about how the body is functioning and whether disease may be present.
A urinalysis typically evaluates:
- Urine concentration (specific gravity)
- Protein levels
- Glucose (sugar)
- Ketones
- Blood
- pH
- Cells
- Bacteria
- Crystals and other microscopic findings
Together, these findings help veterinarians determine whether abnormalities may be originating from the kidneys, bladder, urinary tract, or another body system. They can also help identify patterns that guide decisions about additional testing and treatment.
Why Might My Pet Need a Urinalysis?
Urinalysis is commonly recommended both for routine health screening and for pets experiencing symptoms that may indicate underlying disease. Because urine can provide information about multiple organ systems, it is often included as part of a complete diagnostic workup.
Your veterinarian may recommend a urinalysis if your pet is experiencing:
- Increased thirst or urination
- Urinary accidents
- Blood in the urine
- Suspected urinary tract infections
- Signs of kidney disease
- Symptoms of diabetes mellitus
- Concerns about bladder stones or urinary crystals
Urinalysis is frequently paired with bloodwork and abdominal ultrasound to provide a more complete picture of your pet’s overall health and help identify the underlying cause of clinical signs.
What Can a Urinalysis Tell Us?
A urinalysis can provide valuable information about both urinary tract health and overall systemic health. While it cannot diagnose every condition on its own, it often provides important clues that help guide further testing and treatment decisions.
Findings on urinalysis may suggest:
- Kidney dysfunction
- Urinary tract infections
- Bladder inflammation
- Kidney inflammation
- Crystal formation
- Bladder stone risk
- Diabetes mellitus
- Metabolic disease
- Systemic illness affecting multiple organs
For example, changes in urine concentration may indicate that the kidneys are not functioning normally, while glucose in the urine may suggest diabetes mellitus. Crystals, blood, inflammatory cells, or bacteria can also provide important information about urinary tract health.
In many cases, urinalysis findings help determine whether additional diagnostics such as urine culture, imaging, or specialized laboratory testing may be beneficial.
How Is a Urine Sample Collected?
Urine can be collected in several different ways depending on the diagnostic goals, the patient’s condition, and the information your veterinarian is trying to obtain. Each collection method has advantages and limitations.
Common collection methods include:
- Free-catch collection, obtained while a pet urinates normally
- Catheterization, in which a sterile tube is passed into the bladder
- Cystocentesis, a technique that uses a needle to collect urine directly from the bladder
When evaluating for urinary tract infections, cystocentesis is often preferred because it provides the cleanest sample and minimizes contamination from bacteria that may be present elsewhere in the urinary tract or on the skin.
Your veterinarian will recommend the most appropriate collection method based on your pet’s specific situation and the type of test being performed.
Is Urinalysis Safe?
Yes. Urinalysis is considered a safe and minimally invasive diagnostic test that is routinely performed in both healthy and sick pets.
The urinalysis itself is simply an evaluation of a urine sample and does not cause discomfort. If cystocentesis is used to collect the sample, most pets tolerate the procedure very well. The process is quick, requires minimal restraint in many patients, and is associated with a very low risk of complications.
Because urine collection is relatively simple and provides such valuable information, urinalysis is often one of the first diagnostic tests recommended when evaluating a wide variety of medical conditions.
What Happens After Testing?
One of the advantages of urinalysis is that many results are available the same day. This allows veterinarians to quickly identify abnormalities and determine whether additional testing or treatment may be needed.
If abnormalities are detected, your veterinarian may recommend additional diagnostics such as:
- Urine culture and sensitivity testing
- Bloodwork
- Abdominal ultrasound
- Additional laboratory testing
These recommendations help ensure that abnormalities are interpreted correctly and that the underlying cause is identified whenever possible.
Because urinalysis is often just one piece of the diagnostic puzzle, results are typically evaluated alongside your pet’s medical history, physical examination findings, and any other diagnostic tests that have been performed.
Our Approach at VSP
At VSP, urinalysis is used as part of a comprehensive diagnostic approach designed to provide meaningful information about your pet’s health. Rather than looking at urine results in isolation, we interpret findings alongside physical examination findings, bloodwork, imaging studies, and other diagnostics to develop the most accurate picture possible.
Our goal is not simply to identify abnormalities, but to understand what those abnormalities mean for the individual patient. When concerns are identified, we focus on determining the underlying cause and developing a targeted treatment plan that supports your pet’s long-term health and quality of life.
By combining advanced diagnostics with thoughtful clinical interpretation, we help ensure that pets receive care that is both accurate and individualized.
Concerned About Changes in Your Pet's Urination?
A urinalysis can provide valuable information about your pet’s kidney function, urinary tract health, hydration status, and overall well-being. It is often one of the first diagnostic tests used to identify underlying medical conditions and guide treatment decisions.
At VSP, we use comprehensive urinalysis alongside advanced diagnostics to help uncover the cause. of your pet’s symptoms and develop personalized treatment plans.
Frequently Asked {Questions}
What is a urinalysis used for in dogs and cats?
A urinalysis is used to evaluate kidney function, urinary tract health, hydration status, and metabolic conditions. It can help identify problems such as urinary tract infections, inflammation, kidney disease, bladder stones, and diabetes mellitus.
Why might my veterinarian recommend a urinalysis?
Urinalysis is often recommended when pets are experiencing increased thirst, increased urination, urinary accidents, blood in the urine, or other changes in urinary habits. It is also commonly used as part of routine wellness screening and when monitoring chronic medical conditions.
How is a urine sample collected?
Urine can be collected through free-catch collection, catheterization, or cystocentesis. Cystocentesis involves collecting urine directly from the bladder using a small needle and is often preferred when evaluating for infection because it provides the cleanest sample.
Can a urinalysis detect kidney disease?
Yes. Urinalysis is one of the most important tools for identifying kidney disease. Changes in urine concentration, protein levels, and microscopic findings can sometimes reveal kidney dysfunction before abnormalities appear on bloodwork.
What does a urinalysis actually measure?
A urinalysis evaluates several different aspects of urine, including concentration, protein, glucose, blood, pH, cells, bacteria, crystals, and other microscopic findings. Together, these results provide valuable information about both urinary tract health and overall body function.
Does my pet need to fast before a urinalysis?
In most cases, no. Fasting is not typically required for a urinalysis. However, your veterinarian may recommend fasting if additional testing is being performed at the same visit.
Is a urinalysis painful?
The urinalysis itself is not painful because it simply involves testing a urine sample. Even when cystocentesis is used for collection, most pets tolerate the procedure very well and experience minimal discomfort.
How quickly will I get results?
Many urinalysis results are available same-day. If abnormalities are identified and additional testing such as urine culture is recommended, those results may take several additional days to return.
What happens if my pet's urinalysis is abnormal?
An abnormal urinalysis does not always point to a single diagnosis. Depending on the findings, your veterinarian may recommend additional testing such as urine culture, bloodwork, or abdominal ultrasound to better understand the underlying cause and determine the most appropriate treatment plan.
Will my primary veterinarian stay involved in my pet’s care?
You don’t have to choose between specialty care and your trusted veterinarian. We work closely with referring doctors and share detailed findings and recommendations. This team-based approach ensures your pet receives consistent, coordinated care at every stage.