Cat food for kidney disease
Chronic kidney disease is one of the most common conditions in older cats, and the specific therapeutic diets formulated for it — lower in phosphorus and adjusted protein — are prescription-only foods available through a vet, following diagnosis and ongoing monitoring, not something we or most general pet shops stock. That does not mean nothing you can buy makes a difference; hydration and general diet quality both matter alongside whatever a vet prescribes.
Why kidney diets are prescription-only
Therapeutic renal diets are formulated with a specific, carefully controlled phosphorus and protein content that needs to be introduced and monitored alongside blood tests, since the right level varies by how advanced the disease is and how a cat's body is responding to it. That is a clinical decision for a vet to make and adjust over time, not something to select off a shelf based on the word "kidney" on a label.
If your cat has been diagnosed with kidney disease, your vet will discuss whether a prescription diet is appropriate and provide it directly or refer you to where it is stocked, and will keep monitoring blood work as things progress.
What genuinely helps alongside a vet's plan
Encouraging water intake is one of the more practical things an owner can do, since cats with kidney disease are prone to dehydration — a cat water fountain, which encourages some cats to drink more than they would from a static bowl, and wet food, which contains far more moisture than dry kibble, can both support hydration day to day.
None of this replaces the specific dietary management a vet prescribes, and switching a diagnosed cat's food without veterinary guidance is worth avoiding, since getting the phosphorus and protein balance wrong can do more harm than good.
Signs worth mentioning to a vet
Increased thirst and urination, weight loss, a reduced appetite, and vomiting are the more commonly reported signs of kidney problems in cats, particularly older cats, though they can also indicate other conditions. Any of these are worth a vet visit rather than waiting to see if they pass, since earlier diagnosis generally means more options for managing the disease.
Regular senior health checks, generally recommended from around seven or eight years old, often pick up early kidney changes on a routine blood or urine test well before an owner would notice any change at home, which is one of the more practical arguments for keeping up with them even when a cat seems perfectly well. Older cats are also worth watching for subtler changes than the classic signs, such as sleeping in different spots to be near water, or a coat that looks less well-groomed than usual.
What we stock
Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.
304 Stainless Steel Pet Water Fountain 3.2L
A 3.2L 304 stainless steel fountain that automatically circulates water through a gooseneck spout to keep it fresh. A visible side window shows the water level, so cats and dogs always have clean water.
£36.99
Sensor Cat Water Fountain 2.5L
A 2.5L cat fountain that flows when your cat approaches, keeping water fresh and tempting. A clear level window shows when to refill, and the generous tank meets one cat's needs for several days.
From£43.99
Automatic Cat Water Fountain
A clear automatic pet water fountain with a tap-style spout that circulates fresh, filtered water to encourage your cat to drink. The near-silent pump and large transparent tank let you check water levels at a glance.
£44.99
4L Stainless Steel Pet Water Fountain
A large-capacity stainless steel pet water fountain with an ultra-quiet pump and gentle spout that keeps water fresh and flowing. The circulating stream encourages cats and dogs to drink more and stay hydrated.
From£35.99
Automatic Cat Water Fountain with Filter
A USB-powered water fountain with a near-silent pump and a gentle waterfall spout that encourages cats to drink more. The clear tank lets you check the level at a glance, and the built-in filter keeps water fresh and clean.
£24.99
Stainless Steel Pet Water Fountain
A stainless steel pet fountain that keeps water fresh and flowing to encourage your pet to drink more.
From£31.99
Stainless Steel Pet Water Fountain 3.2L
A 3.2L stainless steel drinking fountain with a quiet gooseneck spout that keeps water circulating and fresh. The clear side window makes refilling easy, helping cats and dogs stay hydrated.
From£39.99
Stainless Steel Pet Water Fountain with Gooseneck Spout
A rounded stainless steel drinking fountain with a rose-gold gooseneck spout that keeps water flowing and aerated. Hygienic and easy to clean, encouraging cats and dogs to drink more often.
From£48.99
Ceramic Cat Water Fountain 3L
A 3L ceramic cat fountain that recirculates and filters water to keep it fresh and flowing.
From£64.99
Self-Refill Cat Water Fountain 3.5L
A quiet fountain with a food-grade stainless steel bowl and a 3.5L reservoir that tops the drinking area up automatically; the maker advises filling to 3L to avoid spills.
£89.99
Ceramic Cat Water Fountain with Stainless Steel Spout
A quiet circulating water fountain with a ceramic basin and arched 304 stainless steel spout. The flowing stream stays fresh and tempting, encouraging cats to drink more throughout the day.
From£37.99
Stainless Steel Cat Water Fountain 3.2L
A 3.2L stainless steel water fountain with dual arching spouts and a water-level window, ideal for multi-pet homes. The ultra-quiet pump circulates fresh water to encourage cats and dogs to drink more.
£39.99
Common questions
- Can I buy prescription kidney food for cats without a vet?
- No — genuine renal diets formulated for cats with diagnosed kidney disease are prescription-only, since the phosphorus and protein levels need to be set and monitored by a vet alongside blood tests. They are not sold as a general pet shop product.
- What can I do to help a cat with kidney disease at home?
- Encouraging water intake is one of the more useful things you can do — a cat water fountain and wet food both help with hydration, which matters a great deal for cats with kidney disease. This supports, but does not replace, whatever dietary plan your vet has prescribed.
- What are the early signs of kidney disease in cats?
- Increased thirst and urination, weight loss, reduced appetite and vomiting are commonly reported early signs, particularly in older cats, though they can also point to other conditions. Any of these are worth raising with a vet rather than waiting to see if they improve on their own.
- Is wet food better than dry food for a cat with kidney problems?
- Wet food contains considerably more moisture than dry kibble, which can help support hydration in cats prone to it, including those with kidney disease. It is not a substitute for a prescribed therapeutic diet, but it can be a sensible general choice alongside your vet's advice.
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Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.