Cats
Larger litter clumps, weight loss and increased appetite may suggest diabetes, thyroid disease or kidney disease and warrant testing.
SYMPTOM → WHAT DO I DO?
Increased drinking or urination
Measure the change without restricting water, and consider endocrine and kidney disease.
CALL YOUR VETERINARIAN PROMPTLY
READ THIS FIRST
Observations can help your veterinarian. They cannot rule out an emergency.
Contact an emergency veterinary facility immediately for difficult breathing, collapse, ongoing seizures, inability to urinate, major bleeding, abnormal gum color, sudden severe abdominal swelling or rapidly worsening weakness.
What could be behind this symptom?
These are possibilities, not a diagnosis. The right explanation depends on the examination, species and medical history.
- Diabetes mellitus, kidney disease or urinary infection
- Hormonal disease, liver disease or medication effects
- Dietary salt, heat, dehydration or reproductive disease
- Behavioral change or increased access to water
Try to establish whether the animal drinks more, passes larger urine volumes, or makes repeated small attempts. These are related but different patterns. Record access to other water sources, diet, medication, and accidents rather than restricting water as a test. Blood and urine testing often provide complementary information about metabolism and water handling. Persistent change is not automatically normal aging, and discomfort or inability to pass urine changes the situation from a routine investigation to urgent care.
An infectious illness depends on both the organism and the animal's ability to resist it. Exposure does not always produce the same severity of illness in every animal. Age, previous immunity, nutrition, stress, and concurrent disease can influence the outcome. The infection may also cause complications that need treatment separately from the organism itself. For example, correcting fluid loss or supporting breathing can be essential even when a targeted medicine has already been started.
The kidneys do more than remove waste. They help regulate water, salts, and other aspects of the body's internal balance. When kidney function changes, thirst, urine output, appetite, and overall strength may change as well. A blood result and a urine result answer different questions: waste concentrations provide one view, while urine concentration and other urine findings provide another. A diagnosis therefore depends on the pattern of results and the animal's condition, rather than one number in isolation.
Hormones are chemical signals that help coordinate functions such as energy use, stress responses, water balance, and reproduction. A shortage or excess may affect several body systems at once, which is why a hormone disorder can resemble other illnesses. Routine bloodwork may show effects of the disorder without confirming its cause. More specific testing may be needed, and illness or medication can influence some results. Monitoring follows both how the animal feels and what the appropriate tests show.
What can you safely check at home?
Write down what you see and bring photographs or video only when doing so does not delay care.
- How often the water bowl needs refilling and whether urine volume truly increased
- Accidents, larger litter clumps, overnight urination or straining
- Appetite, weight, vomiting, energy and medication history
- Whether the animal is intact, recently received steroids or is pregnant
The most useful home observations compare an animal with its own usual pattern. Record intake, output, weight where practical, activity, and comfortable function at consistent times. Normal variations differ between species and life stages. A brief record can reveal a trend that is difficult to remember accurately or reproduce during an appointment. It also helps assess treatment response. Sudden serious changes still need immediate advice; collecting a perfect record should never delay care.
Avoid actions that can make things worse.
- Do not restrict water to prevent accidents.
- Do not stop prescription medication abruptly.
- Do not assume aging alone explains a substantial change.
- Do not confuse frequent tiny urinations with increased urine production.
When should you contact your veterinarian?
- Schedule a prompt examination for persistent increased thirst or urination.
- Bring recent medication names and discuss urine testing and bloodwork.
- Call sooner if appetite, weight or energy are also changing.
A care plan is easier to follow when expected changes are concrete. Ask which signs should improve, what ordinary functions should return, and how soon the team wants an update if that does not happen. Some problems need repeat measurements or examination even when the animal looks better. Record changes consistently and report new signs separately. A recheck evaluates response, complications, and treatment safety, rather than simply deciding whether to repeat the original prescription.
Get emergency help immediately if you see:
- Vomiting, weakness, collapse, dehydration or inability to keep water down
- Straining with little or no urine
- An intact female with increased thirst plus discharge, fever-like behavior or marked lethargy
The same symptom can mean different things in different animals.
Domestic equines
A change in water consumption alongside laminitis, weight change or abnormal hair coat warrants endocrine evaluation.
Reptiles & amphibians
Assess actual water use together with humidity, soaking behavior and enclosure temperature.
TRUSTED SOURCES
Sources behind this guidance
American Veterinary Medical AssociationFirst aid tips for pet owners and limits of home care ↗Merck Veterinary ManualVeterinary professional and pet-owner disease references ↗Merck Veterinary Manual: urinary obstructionWhy urinary blockage in cats requires immediate veterinary attention ↗
These educational resources support a conversation with your veterinary team. They do not replace examination, diagnosis or species-specific emergency care.