5 Signs Your Cat Is Dehydrated (and What to Do About It)

Cats are famously poor drinkers — a hangover from their desert-dwelling ancestors — and that makes dehydration a genuinely common problem. Because cats hide illness so well, it often goes unnoticed until it's affecting their health, particularly their kidneys and urinary tract. Knowing the signs means you can act early.

5 warning signs to watch for

• 1. Lethargy and low energy. A dehydrated cat is often unusually sleepy, flat or reluctant to play.
• 2. Loss of appetite. Dehydration and reduced food intake often go hand in hand.
• 3. Dry or tacky gums. Healthy gums are moist and slick; press gently — dry, sticky gums are a red flag.
• 4. Sunken eyes and a dull coat. Eyes may look sunken and the coat loses its usual sheen.
• 5. Reduced or concentrated urine. Fewer clumps in the litter tray, or very dark, strong-smelling urine, can signal dehydration.

The at-home skin-tent test

Gently pinch the loose skin at the scruff of your cat's neck and release it. In a well-hydrated cat it springs straight back. If it's slow to flatten or stays 'tented', that suggests dehydration — and if paired with any of the signs above, it's time to call your vet.

Why it matters so much for cats

Chronic mild dehydration puts ongoing strain on the kidneys and is closely linked to urinary crystals, cystitis and feline lower urinary tract disease (FLUTD) — as well as chronic kidney disease, which becomes increasingly common with age. Prevention is genuinely one of the kindest things you can do.

How to get your cat drinking more

• Add wet food. It dramatically increases daily moisture intake compared with dry food alone.
• Offer flowing water. Many cats instinctively prefer moving water — a pet water fountain keeps it fresh, filtered and far more tempting than a still bowl.
• Use wide, shallow bowls that don't press on the whiskers, and keep water away from food and the litter tray.
• Provide multiple water stations around the home, refreshed daily.

For a deeper dive, read our guide on why cats won't drink water and how to fix it.

When to see your vet urgently

Dehydration can be a symptom of a serious underlying illness. If your cat shows the skin-tent sign, stops eating or drinking, is lethargic, or is straining or unable to urinate (a genuine emergency, especially in male cats), contact your vet straight away.

Support your cat's hydration and health with our Cats and Feeding & Bowls ranges.

This article is general guidance and isn't a substitute for veterinary advice. If you're concerned about your cat's health, please contact your vet.