Cat Drinking a Lot of Water: Causes, When to Worry, and When to Seek Care

If your cat is drinking more water than usual, it may be a sign that something isn’t quite right. While small changes can happen due to weather or diet, a noticeable or persistent increase in thirst should not be ignored.

In cats, increased water intake is often linked to underlying medical conditions, so it’s important to pay attention to changes in their normal habits.

Common Causes of Increased Thirst in Cats

There are several reasons why a cat may start drinking more water, many of which are related to internal health conditions. Common causes include:

• Kidney disease
• Diabetes mellitus
• Hyperthyroidism
• Urinary tract issues
• Certain medications
• Dehydration
• Liver disease

In many cases, increased thirst is accompanied by increased urination.

When Should You Be Concerned?

While mild increases in water intake may not be urgent, certain signs indicate your cat should be evaluated by a veterinarian.

You should seek care if your cat:

• Is drinking significantly more water than usual
• Is urinating more frequently or in larger amounts
• Has accidents outside the litter box
• Is losing weight
• Has changes in appetite
• Appears lethargic or less active than usual
• Has vomiting or other symptoms

If the increase in thirst is sudden or persistent, it’s best to have your cat evaluated.

How We Diagnose Increased Thirst in Cats

At L&L Animal Urgent Care, we focus on identifying the underlying cause of your cat’s increased water intake.

Diagnostics may include:

• Bloodwork to evaluate kidney function, blood sugar, and overall health
• Urinalysis to assess hydration and detect abnormalities
• Evaluation of medical history and current symptoms
• Additional testing depending on findings

These tests help us determine whether the change is due to a medical condition.

Treatment Options

Treatment depends on the underlying cause of your cat’s increased thirst.

Common treatments may include:

• Management of kidney disease
• Insulin therapy for diabetes
• Treatment for hyperthyroidism
• Fluid therapy if dehydration is present
• Dietary recommendations
• Monitoring and long-term management for chronic conditions

Early diagnosis can help improve outcomes and quality of life.

When in Doubt, Give Us a Call

Increased thirst in cats is often an early sign of an underlying issue. If your cat is drinking more water than usual, it’s best to have them evaluated.

At L&L Animal Urgent Care, we provide same-day urgent care for dogs and cats—helping you get answers and treatment when your pet needs it most.