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Felivis health guide

Senior Cat Drinking and Urinating More

A sustained increase in drinking or urine volume should not be dismissed as normal aging. Older cats often hide illness, so early observations can help the veterinarian investigate sooner.

Published by Felivis Editorial TeamPublisher: Last substantively updated July 15, 2026Independent DVM review pending

Clinical statements are source-checked against the veterinary references listed on this page. No veterinary-reviewed badge is displayed until an identifiable licensed DVM approves the final wording.

Urgency: Schedule veterinary assessment; seek urgent care for weakness, collapse, repeated vomiting, or inability to urinate.
Arrange a veterinary appointment

Drinking and urinating more is not simply “getting old.”

Call the veterinarian when the change is sustained, clearly different from the cat’s baseline, or accompanied by weight, appetite, mobility, behavior, or coat changes.

Cornell identifies chronic kidney disease, diabetes, and hyperthyroidism among common conditions associated with increased thirst and urination in older cats. These diseases can begin with subtle signs and cannot be distinguished by water intake alone.

Keep water available. Do not restrict access to test the cat or reduce accidents. Increased drinking may compensate for increased water loss.
Common medical categories

Why increased thirst and urine volume matter

Chronic kidney disease

As kidneys lose the ability to concentrate urine, a cat may produce more dilute urine and drink more to compensate.

Diabetes mellitus

Glucose in urine can draw additional water into the urine, leading to increased urination, thirst, and often weight loss.

Hyperthyroidism

Common signs can include weight loss, increased appetite, increased thirst and urination, vomiting, diarrhea, or hyperactivity.

Other possibilities

Medication effects and other kidney, liver, hormonal, infectious, or systemic conditions may also change drinking and urination.

The presence or absence of one sign does not confirm a diagnosis. Veterinary testing is needed to evaluate the overall pattern.

Bring a useful baseline

What to track for three to seven days

Water

Measure bowl or fountain refills and note wet-food intake, spills, and shared access.

Urine

Record clump number and approximate size, accidents, color, straining, and urgency.

Weight and appetite

Note measured weight when safe, food eaten, hunger changes, vomiting, and stool.

Behavior and mobility

Track hiding, activity, grooming, jumping, sleep, confusion, and ability to enter the box.

Do not delay the appointment to complete the log

Call first. The veterinary clinic can advise whether the cat should be seen immediately, the same day, or at the next available appointment. Continue tracking only when it is safe to do so.

Make toileting easier

Support a senior cat while waiting for the appointment

  • Add a clean, low-entry litter box near the cat’s main living area.
  • Provide a box on each floor the cat uses.
  • Use non-slip flooring or a stable mat on the approach.
  • Scoop more often because increased urine volume can soil the box quickly.
  • Keep food, water, resting areas, and litter boxes easy to reach.
  • Avoid sudden litter changes and strong fragrance.
  • Watch whether another pet blocks access to water or the litter box.

Environmental improvements can reduce difficulty and help observation, but they do not replace evaluation of the underlying health change.

At the veterinary clinic

What the veterinary team may evaluate

The veterinarian may review water and urine patterns, appetite, weight, medication, and mobility; perform a physical examination; and recommend blood pressure measurement, blood tests, and urinalysis. Depending on the findings, additional testing may be needed.

Call sooner if you notice

  • Rapid weight loss or refusal to eat
  • Repeated vomiting or diarrhea
  • Weakness, collapse, severe lethargy, or dehydration
  • Sudden blindness, disorientation, or trouble walking
  • Straining with little or no urine
  • Major changes after starting a medication
Avoid masking the problem

What not to do

Do not restrict water

Water deprivation can worsen dehydration and does not safely identify the cause.

Do not assume normal aging

Subtle changes can be the first visible signs of treatable disease.

Do not change prescription care independently

Do not stop medication or switch diets without consulting the veterinarian.

Do not focus only on the litter box

Weight, appetite, coat, activity, blood pressure, and other signs may be equally important.

Common questions

Questions about senior cats drinking more

How quickly should I call the veterinarian?

Call when you recognize a sustained or marked change. The clinic can determine urgency based on the cat’s other signs and history.

Could warmer weather explain it?

Weather may affect intake, but a clear sustained change in an older cat should still be discussed, particularly when urine volume or weight also changes.

What if my senior cat eats wet food?

Wet food contributes substantial moisture. Increased bowl drinking despite wet-food intake may be especially noticeable, but total intake and the overall pattern matter.

Can arthritis cause larger accidents?

Arthritis can make reaching or entering the box difficult, while medical conditions may simultaneously increase urine volume. Both should be considered.

Should I buy a fountain before the appointment?

A fountain may improve access for some cats, but it should not delay veterinary evaluation or be treated as a solution to unexplained thirst.

Related Felivis resources

Hydration guideHow much water should a cat drink?Understand total water from food and drinking and how to measure a baseline.Senior-cat hubSenior catsReview litter-box access, mobility, weight, appetite, and routine changes.Litter-box guidePeeing outside the litter boxMedical, mobility, and environmental causes may overlap.Printable toolSenior Cat Litter Box Reset PlanOrganize access, environment, and observation changes.
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Medical disclaimer

Felivis provides educational information only. It does not diagnose, treat, prescribe, or replace veterinary care. If your cat may be blocked, unable to urinate, vomiting, weak, collapsed, or in severe distress, seek emergency veterinary care immediately.

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