How much water should your cat drink?

Cats evolved as desert animals and have low thirst drive — even when dehydrated. Chronic mild dehydration is the leading cause of urinary issues in indoor cats.

Daily target

A healthy adult cat needs 40–60 ml per kg of body weight per day. A 4 kg cat needs ~200 ml. Water from wet food counts — wet food is 70–80% water by weight.

Signs of dehydration

• Skin tenting (gently pinch the skin between shoulder blades — should snap back instantly)
• Tacky or dry gums
• Sunken eyes
• Reduced urination or very concentrated urine

How to increase intake

1. Switch to or add wet food. 1 pouch (85g) = ~70ml extra water.
2. Water fountain. Most cats prefer moving water — the sound triggers drinking.
3. Multiple bowls. One in the kitchen, one in the bedroom. Cats avoid drinking next to their food (instinct from hunting — meat would contaminate the water source).
4. Ceramic or glass over plastic. Plastic holds odors cats can smell.
5. Wide bowl. Cats hate when their whiskers touch the sides ("whisker fatigue").

Special cases

• Chronic kidney disease: vet may prescribe subcutaneous fluids at home
• Diabetes: cats drink and urinate excessively — see vet immediately
• Hot weather (GCC summer): increase fresh water availability, change bowls 2–3 times/day

When to call your vet

• Not drinking at all for 12+ hours
• Drinking dramatically more than usual suddenly
• Drinking + frequent urination together — possible diabetes or kidney issue
• Vomiting or refusing food alongside reduced water intake