Cat & Dog Health • Hydration

How much water should cats and dogs drink?

Water needs vary with body size, diet moisture, temperature, activity, pregnancy or lactation, medications, and disease. Total water intake includes moisture in food—not just what disappears from the bowl.

Veterinarian reviewedUpdated Aug 20, 2026
The key takeaway

Changes from your pet’s normal drinking pattern are often more clinically useful than a single “perfect” daily number.

Wet food changes bowl drinking

Canned diets contain much more water than dry diets, so a pet eating wet food may drink less from the bowl while still receiving adequate total water. Cats naturally tend to have a lower thirst drive than dogs, which makes diet moisture and appealing water access particularly relevant.

How can I encourage hydration?

Provide multiple clean water stations, wash bowls regularly, try bowl materials and locations your pet prefers, and consider fountains for animals that like moving water. For cats, keeping water separate from litter boxes and sometimes from food can improve acceptance.

When increased drinking matters

Kidney disease, diabetes, hormonal disorders, fever, and some medications can increase thirst. If the bowl suddenly empties much faster or urine volume increases, arrange an examination rather than restricting water.

When decreased drinking matters

Vomiting, diarrhea, fever, pain, nausea, oral disease, or inability to access water can contribute to dehydration. Lethargy, dry or tacky gums, repeated vomiting, weakness, or poor urine output warrant prompt veterinary care.