Canine Chronic Kidney Disease: Slowing Progression and Maintaining Quality of Life

Chronic kidney disease (CKD) is one of the most common diseases of older dogs. Dietary management, blood pressure control, and phosphate restriction can slow progression and maintain quality of life for months to years.

Key Facts

CKD affects approximately 0.5-1% of dogs seen in general practice and is among the top three causes of non-traumatic death in dogs over 10 years of age
The IRIS (International Renal Interest Society) staging system classifies CKD into Stages 1-4 based on creatinine and SDMA levels, with substaging by proteinuria and blood pressure
Early CKD (Stages 1-2) is often detected incidentally on routine blood work; clinical signs of lethargy, reduced appetite, increased thirst and urination typically emerge at Stage 3
Renal protective diets with restricted phosphate, reduced protein of high biological value, and omega-3 fatty acid supplementation slow disease progression and reduce uraemic signs
Phosphate restriction is one of the most evidence-based interventions for slowing CKD progression; phosphate binders may be added when dietary restriction alone is insufficient
Systemic hypertension is common in dogs with CKD and causes additional kidney damage, retinal haemorrhage, and neurological signs — treatment with amlodipine is effective
Subcutaneous fluid administration can be taught to owners and provides significant quality of life improvement in dogs with later-stage CKD by correcting chronic mild dehydration

Welfare Considerations

Dogs with CKD experience a gradually worsening constellation of symptoms as kidney function declines: nausea, reduced appetite, fatigue, and the discomfort of chronic low-grade dehydration. Many owners and clinicians underestimate the degree of nausea and malaise that CKD dogs experience day-to-day. Anti-nausea medication, appetite stimulants, and subcutaneous fluids can dramatically improve how a CKD dog feels. The welfare challenge is maintaining quality of life across a trajectory that may span months to years, making regular quality of life assessment essential. Clear communication about end-of-life signs — including when uraemia-related suffering overrides quality of life — is an important part of long-term CKD management.

What You Can Do

Begin annual blood and urine testing for dogs over 7 years to detect CKD before clinical signs develop
Transition to an IRIS-appropriate renal diet as soon as CKD is diagnosed — early dietary change makes the greatest difference
Monitor blood pressure at every veterinary visit for dogs with CKD and treat hypertension promptly with appropriate medication
Ask your vet about teaching you subcutaneous fluid administration at home as CKD progresses to Stages 3-4
Use IRIS CKD quality of life tools and discuss quality of life at every check-up to make end-of-life decisions proactively
Ensure adequate hydration by offering multiple fresh water sources and wet food to reduce CKD progression rate
Support veterinary nephrology research through the Morris Animal Foundation and similar organisations