Chronic kidney disease
Chronic kidney disease is a progressive and irreversible loss of kidney function, common in older cats and also observed in dogs. The kidneys become unable to properly filter waste from the blood over time. It is a progressive disease which...
What is it?
Chronic kidney disease is a progressive and irreversible loss of kidney function, common in older cats and also observed in dogs. The kidneys become unable to properly filter waste from the blood over time. It is a progressive disease which generally persists over several months or even years.
Commonly observed signs
These signs are neither exhaustive nor specific. Only a veterinarian can establish a diagnosis.
Related signs — each one links to its page:
Common signs include excessive thirst, copious amounts of urine, gradual weight loss, and decreased appetite. There is also lethargy, occasional vomiting and sometimes bad breath. These symptoms often appear late, when much kidney function has already been lost.
When to consult without delay
This list does not replace veterinary advice. It gathers situations that justify a prompt consultation.
Causes and risk factors
This disease can result from natural aging of the kidneys, genetic diseases, repeated infections, hypertension or certain toxins. In many cases, the precise cause remains unknown and the disease is simply linked to progressive wear and tear of kidney tissues.
Advanced age is the main risk factor, especially in cats over 8 years old. Certain predisposed breeds, uncontrolled hypertension, chronic dental diseases or an unbalanced diet can also increase the risk.
Transmission
Chronic kidney disease is not a contagious disease and is not transmitted between animals or to humans. It results from an internal process specific to each animal, linked to age or individual health factors.
Diagnosis and care
Diagnosis is the veterinarian's responsibility, based on clinical examination and laboratory tests. Care is decided case by case.
If your pet shows signs suggesting a kidney problem, a veterinary consultation is essential for an appropriate assessment. Only a veterinarian can assess the situation and offer appropriate follow-up. Never attempt to intervene yourself without professional advice.
Prevention
Regular veterinary visits allow signs of kidney damage to be detected early through routine examinations. A balanced diet, constant access to clean water and good dental hygiene help maintain kidney health. It is advisable to consult a veterinarian quickly if changes in behavior or thirst appear.
References
Content reviewed by the TunisieVet editorial team · Updated 18 August 2026
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