When your cat drinks less water: red flags to watch
Cats evolved from desert ancestors and often drink modestly, especially on wet food. Still, big shifts in water intake matter.
Signs something may be wrong
- Drinking much more than usual (often paired with larger urine clumps or accidents)
- Drinking much less plus lethargy, tacky gums, or sunken eyes
- Vomiting or diarrhea (fluid losses add up quickly in small bodies)
Home checks (not a diagnosis)
Gently lift the lip: gums should feel slick, not sticky. Skin “tenting” is less reliable in older cats but sudden changes still warrant attention.
When to call your veterinarian
Any sudden behavior change with appetite loss, weight change, or litter box changes should be evaluated. Kidney disease, diabetes, and hyperthyroidism can all alter thirst—only your vet can diagnose and treat.