Kidney Disease in Dogs: Symptoms, Treatment and UK Vet Costs
Kidney disease is one of the most common serious conditions in older dogs, yet many owners miss the early signs. Catching it early makes a significant difference to both quality of life and long-term prognosis. This guide explains what to look for, how vets diagnose and manage the condition, and what treatment typically costs in the UK.
Key takeaways
- Chronic kidney disease in dogs progresses slowly — early detection through routine senior health checks gives the best chance of a good outcome.
- Management costs vary widely but expect ongoing expenses of £50–£150 per month for diet, medication and monitoring tests.
- A lifetime pet insurance policy is worth considering for any dog diagnosed with CKD, as treatment is lifelong.
What Is Kidney Disease in Dogs?
The kidneys filter waste products from the blood and regulate fluid balance, blood pressure and red blood cell production. When they stop working efficiently, toxins build up and the dog becomes unwell. There are two main forms: acute kidney injury (AKI), which comes on suddenly — often due to toxin ingestion, infection or reduced blood flow — and chronic kidney disease (CKD), which develops gradually over months or years.
CKD is far more common and is staged from 1 to 4 using the IRIS (International Renal Interest Society) guidelines that most UK vets follow. Stage 1 is mild, often symptom-free; stage 4 means severe loss of function. Breeds such as Cocker Spaniels, German Shepherds and Bull Terriers have higher genetic risk, though any dog can be affected. CKD is particularly prevalent in dogs over eight years old.
Signs of Kidney Disease in Dogs
Early-stage CKD often produces no obvious symptoms, which is why routine blood and urine testing in senior dogs is valuable. As the disease progresses, owners may notice increased thirst and urination — the kidneys lose their ability to concentrate urine — along with weight loss, reduced appetite and lethargy.
In more advanced cases, dogs may vomit frequently, develop bad breath with an ammonia-like smell (uraemic breath), and show mouth ulcers. Some dogs become hypertensive, leading to sudden blindness from retinal detachment. Pale gums can indicate anaemia, another complication of kidney failure. If your dog is drinking noticeably more water than usual or seems off colour and losing weight, see your vet promptly — these are warning signs that warrant investigation regardless of the underlying cause.
Diagnosis and Staging
Your vet will begin with a consultation, costing around £40–£65, followed by blood tests to measure creatinine, SDMA (an early marker of kidney decline) and urea, as well as a urine specific gravity test to assess concentrating ability. A full biochemistry panel typically costs £80–£150. Blood pressure measurement (£25–£40) and urine protein-to-creatinine ratio testing may also be recommended.
Ultrasound of the kidneys (£200–£400) helps assess their size and structure and can detect cysts or tumours. Occasionally a kidney biopsy is needed to identify the underlying cause. Once staging is complete under IRIS guidelines, your vet will discuss a management plan tailored to the stage. Repeat testing every three to six months is typical for dogs with CKD, adding ongoing monitoring costs.
Treatment and Management
There is no cure for CKD, but management can slow progression and maintain quality of life for months or years. Diet is central — prescription renal diets are low in phosphorus and high-quality protein; your vet may prescribe a product from Hills, Royal Canin or Purina, costing around £50–£80 per month.
Phosphate binders (given with meals) and ACE inhibitors to reduce proteinuria may be prescribed alongside medications to manage blood pressure and anaemia. Some dogs benefit from subcutaneous fluids administered at home once owners are trained by their vet nurse. Hospitalisation for IV fluid diuresis during acute deteriorations can cost £500–£1,500. Ongoing medication costs typically range from £30–£100 per month depending on complexity. Pet insurance with a lifetime policy is particularly valuable for a condition requiring lifelong management — it's worth checking policy sub-limits for chronic conditions when comparing plans.
Find a Vet Near You
Managing kidney disease means attending regular check-ups, and vet costs for ongoing monitoring can add up quickly. Use CompareMyVet at app.comparemyvet.uk to find local practices, view their published prices and make sure you're getting fair value for your dog's ongoing care.
Related guides
Common questions
It depends on the stage at diagnosis and the dog's response to management. Dogs diagnosed at stage 1 or 2 can live for years with appropriate care. Stage 3–4 carries a more guarded prognosis, but some dogs remain stable for 12–18 months with diligent management.
Chronic kidney disease cannot be reversed, but it can be managed to slow progression and maintain quality of life. Acute kidney injury may be reversible if the cause is identified and treated quickly. Prompt veterinary attention gives the best outcome in either case.
CKD itself is not typically painful, but complications such as mouth ulcers, nausea and high blood pressure can cause significant discomfort. Good management aims to keep your dog comfortable and symptom-free for as long as possible.
CompareMyVet is live in Brighton & Hove — search 29 practices by price, ownership and services. Launching across the UK in 2026.