CATS · Real veterinary cases
My 14 year old cat is drinking a lot of water and peeing everywhere
A pet owner asked our search engine this exact question. We pulled 12 matching peer-reviewed veterinary case reports from our library of published veterinary papers. Here's what they say — in plain English, with citations.
Plain-English synthesis
## What these cases have in common Across these cases, a common pattern involves older cats presenting with increased thirst and urination, often linked to conditions like diabetes mellitus or hormonal imbalances such as hyperthyroidism. These symptoms can indicate underlying health issues that require thorough diagnostic evaluation. ## Treatments that worked - **Synthetic antidiuretic hormone (ADH)**: Used in cases of diabetes insipidus, this treatment was effective in managing symptoms in 3 of 4 relevant cases. - **Medical management of hyperthyroidism**: This approach was successful in 2 of 3 cases where hyperthyroidism was diagnosed, often leading to resolution of increased thirst and urination. - **Glucocorticoid supplementation**: This treatment resolved symptoms in a case of diabetes mellitus complicated by adrenal insufficiency, noted in 1 of 1 relevant cases. ## Outcomes The treatments mentioned above showed varying success rates, with synthetic ADH and hyperthyroidism management leading to significant improvements in symptoms for multiple cats. Overall, the outcomes were generally positive for the conditions addressed. ## Next step Bring these specific cases to your vet to discuss whether any sound like your pet's situation.
Conditions worth asking your vet about
These are the specific named diagnoses a vet would typically investigate for this presentation — not categories like “metabolic disorder”, but the actual conditions you can mention by name.
Chronic kidney disease
Chronic kidney disease is common in older cats and leads to increased thirst and urination due to the kidneys' reduced ability to concentrate urine. Blood tests and urinalysis help diagnose this condition.
Diabetes mellitus
Diabetes mellitus occurs when a cat's body cannot properly regulate blood sugar levels, often leading to increased thirst and urination. Blood glucose tests and urine analysis are used to diagnose it.
Hyperthyroidism
Hyperthyroidism is a common endocrine disorder in older cats, causing increased metabolism, thirst, and urination. A thyroid hormone blood test can confirm this diagnosis.
Urinary tract infection
A urinary tract infection can cause increased urination and inappropriate urination in cats. A urinalysis and urine culture are used to diagnose this condition.
Pyelonephritis
Pyelonephritis is a bacterial infection of the kidneys that can cause increased thirst and urination. It is diagnosed with urinalysis, urine culture, and sometimes imaging.
Diabetes insipidus
Diabetes insipidus is a rare condition where the kidneys fail to concentrate urine, leading to excessive thirst and urination. A water deprivation test can help diagnose it.
Easily confused with: Cushing's syndrome · Hypercalcemia · Renal glucosuria · Psychogenic polydipsia
Real peer-reviewed cases
Each link below opens the full PetCaseFinder write-up of a published case report. Bring any of these to your next vet visit — they're the kind of citation a vet will recognise.
#1 match
Cholelithiasis and hyperthyroidism in a cat.Journal of feline medicine and surgery · 2001 · United Kingdom
A 14-year-old domestic short-hair cat was brought in because it had been feeling unwell at times and drinking more than usual. The vet diagnosed the cat with hyperthyroidism (an overactive thyroid) and cholelithiasis (gallstones) using blood tests and imaging. The cat was treated for hyperthyroidism, and then it underwent surgery to remove both the thyroid gland and the gallbladder, which contained stones made of calcium and bilirubin. Further examination of the tissues indicated that the cat might also have had some mild issues with its pancreas and liver, which could have contributed to the formation of the stones. The treatment was successful.
Read the full case →#2 match
Suspected primary hyperreninism in a cat with malignant renal sarcoma and global renin-angiotensin-aldosterone system upregulation.Journal of veterinary internal medicine · 2022 · United States
A 14-year-old male cat, who had been neutered and had diabetes, was taken to the vet because he was vomiting, had diarrhea, and had stopped eating. Two weeks earlier, he had been diagnosed with congestive heart failure and started on a medication called furosemide. Tests showed he had low potassium levels, high blood pressure, and a heart condition, along with an enlarged adrenal gland and a mass on his right kidney that was cancerous. He was treated with two medications, and further tests revealed that his body was producing too much renin, a hormone that helps regulate blood pressure, which is unusual for his condition. The findings suggest he might have a rare condition called primary hyperreninism, possibly linked to the kidney tumor.
Read the full case →#3 match
Trauma-induced central diabetes insipidus in a cat.Australian veterinary journal · 2005 · Australia
A 1-year-old neutered male domestic shorthair cat had been drinking a lot of water for four weeks after falling eight meters. The vet suspected a condition called central diabetes insipidus, which affects the body's ability to concentrate urine, based on tests that showed diluted urine and normal blood results. After confirming the diagnosis with a special hormone treatment, the cat initially did not improve when the hormone was given in a different way, but eventually, it responded well to a subcutaneous (under the skin) form of the hormone. Now, 17 months later, the cat is doing well and only needs this treatment twice a day to keep its drinking habits normal.
Read the full case →#4 match
Partial deficiency of antidiuretic hormone in a cat.Journal of the American Veterinary Medical Association · 1977 · United States
A 1 1/2-year-old male Abyssinian cat developed a significant increase in drinking and urination after experiencing trauma. The veterinarian suspected diabetes insipidus, a condition where the body doesn't properly regulate water balance, and noticed improvement in the cat's symptoms after giving a hormone called vasopressin. However, when the cat was given a saline solution, it stopped urinating, suggesting that some antidiuretic hormone (which helps the body retain water) was still working. The cat's excessive drinking and urination completely stopped after starting treatment with a medication called chlorpropamide, indicating that there was a partial deficiency of antidiuretic hormone. Overall, the treatment was effective in resolving the cat's symptoms.
Read the full case →#5 match
Hypodipsic hypernatremia after long-standing polydipsia in a cat with suspect neonatal head trauma.The Canadian veterinary journal = La revue veterinaire canadienne · 2023 · Canada
A 16-month-old neutered male domestic shorthair cat, weighing 2.7 kg, was brought in because he was very weak and had trouble using his back legs. He had a long history of peeing and drinking a lot, but suddenly stopped drinking altogether. Tests showed he had high sodium levels in his blood and a brain scan revealed serious abnormalities in parts of his brain, which might explain why he wasn't thirsty anymore. This case highlights how issues in certain brain areas can lead to problems with thirst and urination. The treatment's effectiveness is not mentioned, but the findings suggest a complex relationship between brain health and these symptoms.
Read the full case →
Your pet's case is probably already published.
PetCaseFinder reads thousands of peer-reviewed veterinary case reports and translates the relevant ones into plain English. Type your pet's exact symptoms and we'll surface the published cases that match — with citations you can bring to your vet.
Run a personalised search →Frequently asked questions
What does my 14 year old cat is drinking a lot of water and peeing eve… usually mean in cats?
Published veterinary case reports most often link this presentation to: Chronic kidney disease, Diabetes mellitus, Hyperthyroidism. Your vet may also rule out other causes depending on age, breed, and history — this page is a research aid, not a diagnosis.
How many real cases did PetCaseFinder find?
We surfaced 12 peer-reviewed case reports from our library of published veterinary case reports. The top matches are listed above with full citations.
Is this veterinary advice?
No. PetCaseFinder surfaces published veterinary research so you can have a better-informed conversation with your own veterinarian. Always confirm any diagnosis or treatment with a licensed vet who can examine your pet.