Kidney problems can make a dog seriously ill, but not every change in drinking or urination is an emergency. The key is to recognize signs that cannot wait—especially a dog that is struggling to pass urine, collapsing, repeatedly vomiting, or becoming profoundly weak. Those symptoms can also have causes other than kidney disease, so a veterinarian must examine the dog rather than diagnosing kidney failure from symptoms alone.
Go to an emergency veterinarian now for these signs
- Straining with little or no urine: A urinary blockage can rapidly become life-threatening. Do not wait overnight or try to treat it at home.
- Collapse, severe weakness, confusion, or a seizure: These may reflect dangerous metabolic changes, poisoning, shock, or another emergency.
- Difficulty breathing or very pale, gray, or blue gums: Emergency assessment is needed regardless of whether your dog has a kidney diagnosis.
- Repeated vomiting with inability to keep water down: Dehydration and electrolyte disturbances can worsen quickly.
- Possible ingestion of toxins: Antifreeze, certain medications, grapes or raisins, and other substances can injure kidneys. Contact a veterinarian or an animal poison-control service immediately; do not induce vomiting unless directed.
Call the emergency clinic on the way so its staff can prepare. Keep your dog quiet, avoid unnecessary handling, and bring medication containers or packaging if a toxic exposure is possible.
Changes that deserve prompt veterinary evaluation
Increased thirst, larger or more frequent urination, reduced appetite, gradual weight loss, bad breath, and lower energy can occur with chronic kidney disease. They can also appear with diabetes, urinary problems, or other illnesses. Arrange a veterinary examination rather than assuming the kidneys are responsible. If a dog with known kidney disease suddenly stops eating, vomits, or seems substantially worse, contact the veterinarian the same day.
Acute kidney injury is different from chronic kidney disease
Acute kidney injury can develop over hours or days after illness, poor blood flow, toxin exposure, or obstruction. Chronic kidney disease generally develops over months or years and may show few obvious signs early. A dog with chronic disease can also develop an acute crisis. Owners cannot reliably distinguish these conditions at home.
How a veterinarian checks for kidney trouble
The visit may include an examination of hydration and bladder size, blood tests for kidney values and electrolytes, urinalysis with urine concentration measurements, blood pressure, and imaging when indicated. These tests help distinguish kidney dysfunction from dehydration and urinary blockage. Treatment depends on the cause; a dog may need monitored fluids, relief of an obstruction, hospitalization, or an individual long-term plan.
What to do—and avoid—while arranging care
- Record when your dog last urinated, any vomiting, water intake changes, and current medications.
- Unless a veterinarian has told you otherwise, leave drinking water available. Do not force water into a nauseated or weak dog.
- Do not give ibuprofen, naproxen, leftover antibiotics, herbal kidney cleanses, or supplements as a substitute for diagnosis.
- Never change a prescribed kidney diet, fluid plan, or medicine dose during a crisis without veterinary guidance.
After the immediate problem is treated
Dogs with ongoing kidney disease may need periodic blood and urine tests, blood-pressure checks, nutrition tailored to their disease, and treatment of complications. Read our related guides to kidney disease symptoms and kidney disease treatment. An online veterinarian can help discuss nonemergency results and follow-up questions, but cannot replace an emergency examination, laboratory testing, or intravenous treatment.
Sources and medical context
Merck Veterinary Manual: noninfectious diseases of the urinary system in dogs; Merck Veterinary Manual: detecting kidney and urinary tract disorders. This information is educational, not a diagnosis or treatment plan for an individual pet.
This article is for general education and is not a substitute for care from your own veterinarian. Learn about The Pet Vet and our editorial policy.