Healthy on the Outside, But What About the Inside? Why Routine Labwork Matters for Your Pet
Your pet may look healthy, act normally, and have plenty of energy, but what is happening on the inside?
As pet owners, we do everything we can to keep our furry family members happy and healthy. We provide nutritious food, exercise, preventative medications, and plenty of love. But one important part of preventative healthcare is often overlooked: routine laboratory testing.
At ZimmVet, we recommend annual labwork for pets under 7 years of age and labwork every 6 months for our senior pets, ages 7 and older.
Why? Because our pets can’t tell us when something feels wrong, and many medical conditions can develop long before noticeable symptoms appear.
Why Is Routine Labwork So Important?
Think of routine labwork as a peek inside your pet’s body. While a physical examination tells us a lot about your pet’s overall health, laboratory testing provides valuable information that we simply cannot see or feel during an exam.
Routine bloodwork can help us evaluate:
- Kidney function: Identifying changes that may indicate kidney disease or other concerns.
- Liver health: Monitoring liver enzymes and other values that may indicate changes in liver function.
- Blood sugar: Screening for abnormalities that may be associated with conditions such as diabetes.
- Red and white blood cells: Looking for signs of anemia, inflammation, infection, and other abnormalities.
- Electrolytes and proteins: Evaluating important values that help us understand hydration, organ function, and overall health.
Depending on your pet’s age, medical history, and individual needs, your veterinarian may also recommend urine testing, thyroid testing, or other diagnostics.
The goal isn’t just to find illness. It’s to establish what is normal for YOUR pet so we can recognize changes early.

Pets Under 7: Why Test Every Year?
It’s easy to assume that a young, energetic pet doesn’t need bloodwork. After all, if they’re eating, playing, and acting normally, everything must be fine, right?
Not necessarily!
Even young and middle-aged pets can develop medical conditions without showing obvious symptoms.
Annual labwork allows our veterinary team to establish baseline values for your pet. These results give us a reference point to compare against future testing.
For example, your pet’s kidney values may fall within the normal reference range, but gradually increase from year to year. By monitoring these trends, we may recognize a developing concern before those values become abnormal.
Annual testing also provides an opportunity to identify unexpected changes, monitor overall health, and make more informed decisions about medications or additional diagnostics.
Preventative care isn’t just about treating problems. It’s about looking for them before they become bigger problems.
Senior Pets (7+): Why Every 6 Months?
Our pets age much faster than we do, and as they get older, their healthcare needs change.
At ZimmVet, we consider pets ages 7 and older to be seniors. While the aging process varies by species, breed, and size, this is when we recommend transitioning to more frequent laboratory monitoring.
As pets age, they become more susceptible to conditions such as:
- Chronic kidney disease
- Liver disease
- Diabetes
- Thyroid disorders
- Anemia and other blood cell abnormalities
- Other age-related health concerns
Many of these conditions can develop gradually, and the earliest signs may be subtle or easy to mistake for normal aging.
Changes such as sleeping more, drinking additional water, losing weight, or slowing down may seem like typical signs of getting older. However, they can also indicate an underlying medical concern.

Why not just wait until next year?
A lot can change in six months, especially for a senior pet.
By checking labwork twice a year, we have more opportunities to identify changes, monitor existing conditions, and adjust treatment plans when necessary.
For pets already managing chronic illnesses or taking long-term medications, regular testing can be particularly valuable in evaluating how their bodies are responding.
Age itself isn’t a disease, but aging can increase the risk of developing one.
Our goal is to help your senior pet stay comfortable, active, and healthy for as long as possible.
But My Pet Seems Perfectly Healthy!
We hear this all the time, and we LOVE hearing that your pet is doing well!
However, one of the biggest challenges in veterinary medicine is that animals are incredibly good at hiding illness.
In the early stages of certain diseases, pets may continue eating, drinking, playing, and behaving just as they normally would.
By the time noticeable symptoms develop, some conditions may have already progressed.
Routine labwork gives us an opportunity to investigate potential concerns earlier, when there may be more options for monitoring, management, or treatment.
And when everything comes back normal? That’s great news, too!
Normal results provide reassurance and valuable information for future comparisons.
What Happens If We Find Something Abnormal?
An abnormal lab result doesn’t automatically mean your pet has a serious illness.
Laboratory values can be influenced by many factors, including hydration, medications, stress, and individual variation.
If we identify something outside the expected range, our veterinarians will evaluate those findings alongside your pet’s physical examination, medical history, and previous results.
Depending on the findings, we may recommend monitoring, repeating a test, additional diagnostics, or discussing treatment options.
Our goal is always to make informed, individualized recommendations that support your pet’s long-term health.

A Small Step Toward a Healthier Future
We know that veterinary care is an investment, and it can be tempting to skip laboratory testing when your pet seems healthy.
But routine labwork is one of the most valuable tools we have for understanding what’s happening inside your pet’s body.
At ZimmVet, we recommend:
- Pets under 7 years old: Routine labwork every 12 months.
- Senior pets, ages 7 and older: Routine labwork every 6 months.
- Pets with ongoing medical conditions: Testing as recommended by their veterinarian, which may be more frequent.
These are general recommendations, and your veterinarian may adjust the testing schedule based on your pet’s individual needs.
Because They Deserve More Than Just Feeling Fine
Our pets give us so much throughout their lives. From puppy and kitten adventures to the slower, sweeter senior years, we want to help make every stage as healthy and comfortable as possible.
Routine labwork helps us do more than react to illness. It helps us be proactive about your pet’s health.
Is your pet due for their annual or senior wellness labwork?
Contact ZimmVet to schedule an appointment and give your pet the benefit of proactive, personalized veterinary care.
