- VEG
- 5 hours ago
- 8 min read
Hearing that your dog may have kidney disease can feel scary and overwhelming - especially if they’ve suddenly started showing alarming symptoms or are just not acting like themselves.
In this blog, we’ll explain:
The difference between kidney disease and kidney failure
Acute vs. chronic kidney disease
Common symptoms and stages
Treatment options, including dialysis
When kidney disease becomes an emergency
If your dog suddenly becomes weak, stops urinating, and cannot keep food or water down, seek help from your nearest VEG ER for Pets location immediately.
What is kidney disease in dogs?
Your dog’s kidneys do a lot behind the scenes to keep them healthy, helping filter waste from the blood, regulate hydration, and balance electrolytes. When the kidneys aren’t working the way they should, toxins can build up in the body and make dogs very sick.
Some kidney problems develop slowly over time, while others can quickly become an emergency that needs immediate veterinary care. Knowing the early signs of kidney disease and kidney failure can help pet parents catch problems sooner, get treatment earlier, and give their dog the best possible care.
Kidney disease in dogs occurs when the kidneys are no longer able to function normally. Healthy kidneys act like your dog’s filtration system, removing waste products from the blood while helping regulate hydration, blood pressure, electrolytes, and red blood cell production.
When the kidneys become damaged, waste and toxins begin building up in the bloodstream. Over time, this can affect nearly every part of the body.
Kidney disease vs. kidney failure in dogs
The terms “kidney disease” and “kidney failure” are often used interchangeably, but they are not exactly the same. Kidney disease is a broad term that describes reduced kidney function. In many cases, kidney disease develops gradually and may initially cause only mild symptoms.
Kidney failure refers to severe loss of kidney function. This can happen suddenly, or it can occur after kidney disease progresses over time.
The difference between kidney disease and kidney failure in dogs
Kidney disease
Reduced or declining kidney function
May progress slowly over time
Symptoms can be mild early on
Often manageable with long-term treatment and monitoring
Kidney failure
Severe or complete loss of kidney function
Often causes serious illness
May become life-threatening
Can require hospitalization and intensive care
Acute vs. chronic kidney disease in dogs
Understanding the difference between acute and chronic kidney disease is important because the causes, treatment approaches, and urgency can be very different.
The difference between acute kidney disease and chronic kidney disease
Acute Kidney Injury (AKI)
Acute kidney injury, sometimes called acute kidney failure, develops suddenly - often over hours or days. This condition can lead to the build-up of toxins and other waste products in the bloodstream, dehydration, electrolyte imbalances, and disturbances in the acid-base balance of the blood. It should be considered a medical emergency.
Chronic Kidney Disease (CKD)
Chronic kidney disease develops slowly over time and is more common in older dogs. Unlike acute kidney injury, chronic kidney disease is usually irreversible. However, many dogs can still maintain a good quality of life for months or years with proper management.
What causes kidney disease in dogs?
Kidney disease can develop for many different reasons. Some causes are sudden and preventable, while others occur gradually over time.
Common causes for kidney disease in dogs
Toxins
Certain toxins can severely damage the kidneys and lead to acute kidney failure. Common kidney toxins for dogs include:
Play-Doh (contains the same toxin found in grapes)
Certain human medications, including some pain relievers
If you suspect your dog may have ingested a toxin, immediate veterinary care can be lifesaving.
Infections
Some infections can damage the kidneys or trigger inflammation. Examples include:
Severe bacterial infections
Chronic health conditions
Underlying medical conditions can contribute to kidney disease over time. Examples include:
Autoimmune disease
Age and genetics
As dogs age, kidney function may naturally decline. Some breeds may also have a higher risk of inherited kidney problems.
Signs and symptoms of kidney disease in dogs
The symptoms of kidney disease in dogs often become more noticeable as the condition progresses. Some early signs can be easy to miss, especially in chronic kidney disease.
Kidney disease in dogs: signs to watch for
Early signs of kidney disease in dogs
Early symptoms may include:
Increased urination
Mild appetite changes
Bad breath
Progressive symptoms
As kidney disease worsens, dogs may develop:
Significant weight loss
Muscle loss
Severe symptoms that may signal kidney failure
Advanced kidney disease or acute kidney failure can cause severe symptoms such as:
Dogs that suddenly become weak, stop urinating, or have repeated vomiting should be seen by an emergency veterinarian immediately.
How kidney disease in dogs is diagnosed
Veterinarians use several tests to diagnose kidney disease and determine how severe it is.
Bloodwork. Blood tests help evaluate kidney function and look for waste products building up in the bloodstream.
Urinalysis. A urine test helps vets evaluate protein loss and hydration levels, as well as signs of infection.
Imaging. X-rays and ultrasound can help evaluate the kidneys and identify abnormalities such as stones, obstructions, or changes in the size and shape of the kidneys.
Blood pressure monitoring. High blood pressure commonly occurs alongside kidney disease and may worsen kidney damage.
Staging. Veterinarians often use the IRIS staging system to classify chronic kidney disease based on bloodwork, urine testing, and blood pressure. Staging helps guide treatment and monitoring recommendations.
Stages of kidney disease in dogs
Chronic kidney disease in dogs is commonly divided into four stages. Dogs may move through these stages gradually over time, though the progression varies significantly between different cases.
Stages of kidney disease in dogs
Stage 1
Stage 1 is considered early disease. Many dogs have few or no obvious symptoms during this stage. Kidney values may still appear normal, but subtle changes can often be detected through bloodwork or urinalysis. Monitoring and early management are important during this stage.
Stage 2
Mild elevations in kidney values are apparent at this stage. Dogs in Stage 2 may begin showing more noticeable symptoms such as:
Increased thirst
Increased urination
Appetite changes
Your vet may recommend prescription kidney diets and routine monitoring at this stage.
Stage 3
Moderate elevations in kidney values are apparent at this stage. Stage 3 usually causes more significant symptoms such as:
Poor appetite
Dehydration
More intensive medical management is typically needed at this stage.
Stage 4
Severe elevations in kidney values are seen at this stage. Dogs at Stage 4 often feel very ill and may develop serious complications. Quality-of-life discussions and advanced supportive care become especially important at this stage.
Is kidney disease in dogs an emergency?
Some kidney disease symptoms can be monitored through routine veterinary visits, while others require immediate emergency care.
Your dog should be seen as soon as possible if they develop:
Repeated vomiting
Refusal to eat
Noticeable lethargy
Significant dehydration
Sudden worsening of chronic kidney disease symptoms
When emergency veterinary care is needed immediately
Kidney disease may become life-threatening when symptoms escalate rapidly. Seek emergency veterinary care immediately if your dog develops:
Collapse
Severe weakness
Severe vomiting
Suspected toxin ingestion
Sudden dramatic decline
Acute kidney failure can progress quickly and may become life-threatening without immediate treatment.
Treatment for kidney disease in dogs
Treatment depends on whether the kidney disease is acute or chronic, how severe the condition is, and what underlying cause is present.
How our vets treat kidney disease in dogs
Fluid therapy
Fluid therapy is one of the most important treatments for kidney disease.
Fluids help to:
Correct dehydration
Support circulation to the kidneys
Improve electrolyte balance
Some dogs require hospitalization and IV fluids, while others may receive subcutaneous fluids at home.
Medications
Veterinarians may prescribe medications to help manage symptoms and complications. These may include:
Anti-nausea medications
Appetite stimulants
Phosphate binders
Antibiotics when infection is present
Prescription kidney diets
Specially formulated kidney diets can help reduce stress on the kidneys and support long-term management. These diets are often lower in phosphorus and designed to help maintain hydration and nutrition.
Long-term monitoring
Dogs with chronic kidney disease typically require ongoing monitoring through:
Repeat bloodwork
Urinalysis
Blood pressure checks
Weight monitoring
Many dogs can continue to enjoy a good quality of life with consistent treatment and monitoring.
Dialysis for dogs: when is it used?
Dialysis is an advanced treatment that can help support dogs with severe kidney injury or kidney failure. Dialysis temporarily performs some of the kidneys’ filtering functions by removing waste products and excess fluid from the bloodstream.
Dog kidney dialysis is most commonly used in:
Severe acute kidney injury
Certain toxin exposures
Cases where the kidneys may recover with time and support
Dialysis does not cure kidney disease, but it may help stabilize some patients while veterinarians treat the underlying cause. It can also make your pup more comfortable while giving time for kidney function to possibly return. Not every dog is a candidate for dialysis, and this treatment is typically available only at specialty or emergency hospitals. In some severe cases, dialysis can be lifesaving.
How long can a dog live with kidney disease?
Life expectancy for dogs with kidney disease varies widely. Some dogs with early-stage chronic kidney disease may live for years with careful management. Others with severe disease or acute kidney failure may decline much more quickly.
Factors that influence survival include:
Stage of disease
Underlying cause
How early treatment begins
Response to therapy
Ability to maintain hydration and nutrition
Quality of life is also an important consideration. Your veterinarian can help guide treatment decisions based on your dog’s specific condition and long-term comfort.
Can kidney disease in dogs be prevented?
Not all kidney disease can be prevented, but early detection and prompt treatment may reduce the risk of severe complications.
Pet owners can help support kidney health by:
Keeping dogs well hydrated
Scheduling regular veterinary checkups
Completing routine bloodwork for senior dogs
Preventing access to toxins
Storing medications safely
Treating infections promptly
Recognizing symptoms early may also help dogs receive treatment before kidney disease becomes advanced.
VEG ER is open 24/7 to treat your dog’s emergency symptoms
A diagnosis of kidney disease in your dog can feel scary and hopeless. Recognizing the symptoms early, understanding the difference between chronic kidney disease and acute kidney failure, and knowing when emergency care is needed can make a significant difference in your dog’s outcome.
If your dog is drinking excessively, vomiting, suddenly lethargic, or showing signs of kidney failure, find your nearest VEG ER for Pets dog hospital as soon as possible. All of our pet hospitals are open 24 hours, including weekends and holidays, to help get your dog the care they need.
