Veterinary advice

Dog or cat drinking more water: when to seek advice

Increased thirst may follow hot weather or a change in diet, but it can also signal illness. What to observe and when tests are needed.

2026-10-02

Veterinary examination of a pet in a clinic

When thirst changes

A pet may drink more during hot weather, after exercise or when switching to dry food. But if you are refilling the bowl much more often for several days, take notice.

Do not restrict water to test whether the thirst stops. Fresh drinking water should always remain available.

What to record before the appointment

Measure roughly how much your pet drinks over 24 hours, and note its weight, diet and activity level. If several pets share a home, observe them separately when possible.

Also watch for more frequent urination, changes in appetite or weight, vomiting and reduced energy.

What might cause it

Increased thirst can occur with kidney disease, diabetes, hormonal disorders, certain medicines and other conditions. Water intake alone cannot establish a diagnosis.

After examining your pet, a veterinarian may recommend blood and urine tests. The choice of tests depends on age, symptoms and examination findings.

When to seek urgent help

Severe weakness, repeated vomiting, inability to pass urine or altered consciousness alongside increased thirst requires urgent veterinary care.

If your pet otherwise seems well but is consistently drinking more than usual, arrange a veterinary appointment rather than waiting for more obvious symptoms.

FAQ

Dog or cat drinking more water: when to seek advice?

Severe weakness, repeated vomiting, inability to pass urine or altered consciousness alongside increased thirst requires urgent veterinary care.

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