Companion Animals

Feline Polydipsia: Welfare and Management of Excessive Thirst in Cats

Excessive drinking in cats signals serious underlying conditions including kidney disease, diabetes, and hyperthyroidism requiring prompt veterinary assessment.

Key Facts

Polydipsia defined as drinking more than 100 mL/kg/day in cats
Most common causes are chronic kidney disease, diabetes, and hyperthyroidism
Psychogenic polydipsia is rare in cats compared to dogs
Blood and urine tests are essential for accurate diagnosis
Early detection significantly improves outcome for underlying conditions

Welfare Considerations

Cats with polydipsia often experience discomfort from the underlying condition causing it. Untreated chronic kidney disease causes uraemia, nausea, and deteriorating quality of life. Diabetes causes hyperglycaemia, weakness, and risks of diabetic ketoacidosis. Monitoring water intake at home is a sensitive early welfare indicator. Many owners miss subtle increases in drinking until disease is advanced. Fresh water availability and wet food diets support hydration.

What You Can Do

Monitor your cats water intake and seek veterinary advice if increased
Provide multiple water sources and wet food to support hydration
Seek blood and urine testing for any cat with increased thirst
Follow veterinary management plans for diagnosed underlying conditions
Regular health checks allow early detection of metabolic diseases