CatUrinary

Drinking noticeably more in cats: what to do

Cats naturally drink little — obvious polydipsia suggests kidney disease, diabetes or hyperthyroidism.

What are the common causes?

Chronic kidney disease (CKD)

See a vet within 24 hours

The most common chronic disease of senior cats; early signs are subtle — blood creatinine + urinalysis stage it.

Feline diabetes

See a vet within 24 hours

Overweight cats are prone; with early, proper treatment some cats go into remission.

Feline pyometra (uterine infection)

Emergency — go now

A post-heat emergency of unspayed females, often better hidden than in dogs (cats lick away discharge). Thirst + lethargy + a changing belly deserves high suspicion; surgery is the cure.

Home care & observation tips

✓Increase water (wet food first)
✓Get kidney values + urinalysis for staging
✓Transition to renal diets only with vet guidance
✓Log water intake and litter-clump changes
✓Move to low-carb wet food structure (with vet guidance)
✓Get a glucose curve + urinalysis

When must you see a vet?

⚠Polydipsia/polyuria or steady weight loss over 10
⚠Vomiting + severe lethargy (decompensation)
⚠Increased drinking/urination + weight loss
⚠Walking on hocks (neuropathy sign)
⚠Thirst + lethargy in an unspayed female
⚠Discharge or crusted fur at the vulva

FAQ

Is drinking noticeably more in cats serious?

It depends on the combination of symptoms, how long it has lasted, and your pet's energy and appetite.Note that it can appear in problems that need prompt care, such as Chronic kidney disease (CKD), Feline diabetes, Feline pyometra (uterine infection). Enter the full symptom combination in our symptom checker for a more specific urgency assessment.

Can I monitor at home first? What should I watch?

If energy and appetite are normal with no other signs, 24-48 hours of monitoring is reasonable. Keep notes on frequency, duration, appetite, water intake, energy and what the stool/urine looks like — vets find this very useful.

What should I prepare before the clinic?

Note when the symptom started and how it changed; bring packaging or residue if ingestion is suspected; bring vaccination and deworming records; and if possible take a video (odd gait, cough sound) — clearer than describing.

Not sure how serious it is? Assess it with the symptom checker

Start symptom check →