Can I just feed a lower-protein food instead of a prescription diet?

Not safely on your own judgement. The right protein level depends on how advanced the kidney disease is and what your dog's blood results show, and too little good-quality protein can cause its own problems. This is a decision for your vet to make with you, not one to guess at from a label.

Do you sell prescription renal diets?

No. Prescription diets, kidney diets included, are supplied through a vet once your dog has been assessed, and a prescription diet is never something a general shop can hand over without that assessment. We carry general wet food, sensitive-stomach recipes and senior formulas that some owners use alongside veterinary advice, but none of them replaces a diet your vet has prescribed.

What are the signs of kidney problems in dogs?

Drinking and urinating more than usual, weight loss, a poor appetite, vomiting and a dull coat are all things vets look into, but none of them confirms kidney disease on its own. If you notice any of these, book a vet appointment for blood and urine tests rather than waiting to see if they pass.

Does wet food help a dog with kidney disease?

It can help with hydration, since wet food carries far more moisture than dry kibble of the same weight, and some dogs find it more appealing when their appetite has dropped. It is not a substitute for a prescribed renal diet, but it is a reasonable thing to raise with your vet as part of the wider plan.

My dog won't eat the prescription diet my vet gave us — what should I do?

Speak to your vet rather than mixing in something else without asking. Many practices carry more than one renal diet and more than one format — wet, dry, different flavours — precisely because palatability is a real problem with these diets, and there is usually another option worth trying before giving up on the approach altogether.

Food for dogs with kidney failure

A dog with diagnosed kidney failure needs a therapeutic diet prescribed by a vet, not a product picked off a shelf. Prescription renal diets are only available through a vet once your dog has been assessed — but there are honest, general things worth understanding about why the diet matters and what you can reasonably do alongside it.

Why the diet is central to managing it

Kidneys that are failing lose some of their ability to filter waste products from the blood, and diet is one of the main tools used to reduce the load on them. Prescription renal diets are formulated with tightly controlled levels of phosphorus and a specific quality and amount of protein, worked out for the individual dog by a vet based on blood results and how advanced the condition is.

That is precisely why this is not something a general pet shop, however good the range, can responsibly offer off the shelf. The right level of restriction for one dog can be wrong for another, and getting it wrong is not a minor issue — it is why these diets require a vet's assessment and, in the UK, are generally only available on prescription.

What to look for on a label, if you're comparing foods

If your vet has given you a target to aim for rather than a named prescription product, the phosphorus content and the protein source and quality are the two figures worth checking on any label, alongside sodium. These vary a great deal between ordinary complete foods, which is exactly why a therapeutic diet is formulated rather than assembled from a standard range.

Palatability matters more than usual too. Dogs with kidney disease can go off their food, and a diet that goes untouched helps nobody, however well it is formulated on paper. Vets will often talk through several options for this reason, including wet formats that are easier for an unenthusiastic dog to eat.

Hydration is something you can genuinely help with

Encouraging your dog to drink more, and feeding a higher-moisture diet where your vet agrees it's appropriate, supports kidneys that are already under strain. Wet food carries far more water than a dry kibble of the same weight, which is one reason vets sometimes shift a dog with kidney concerns toward wet or moistened meals even before a full therapeutic diet is started.

A water fountain or a second water bowl in a different part of the house can genuinely increase how much some dogs drink, simply by making water more available and more appealing. It is a small, low-risk thing to try alongside whatever your vet has recommended.

What we can help with, and what we can't

We stock general wet foods and complete diets formulated for sensitive stomachs and older dogs, and those can be a reasonable, palatable option to discuss with your vet as part of the wider picture — but none of them is a substitute for a therapeutic renal diet, and none of them is formulated to the phosphorus and protein targets a vet will set for a dog with diagnosed kidney failure.

If your dog has not yet been assessed and you are feeding because of symptoms you are worried about — drinking more, losing weight, being sick, going off food — book a vet appointment before changing anything. Kidney failure is diagnosed from blood and urine tests, not from symptoms alone, and a proper diagnosis is what any dietary change should be based on.

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Common questions

Can I just feed a lower-protein food instead of a prescription diet?: Not safely on your own judgement. The right protein level depends on how advanced the kidney disease is and what your dog's blood results show, and too little good-quality protein can cause its own problems. This is a decision for your vet to make with you, not one to guess at from a label.
Do you sell prescription renal diets?: No. Prescription diets, kidney diets included, are supplied through a vet once your dog has been assessed, and a prescription diet is never something a general shop can hand over without that assessment. We carry general wet food, sensitive-stomach recipes and senior formulas that some owners use alongside veterinary advice, but none of them replaces a diet your vet has prescribed.
What are the signs of kidney problems in dogs?: Drinking and urinating more than usual, weight loss, a poor appetite, vomiting and a dull coat are all things vets look into, but none of them confirms kidney disease on its own. If you notice any of these, book a vet appointment for blood and urine tests rather than waiting to see if they pass.
Does wet food help a dog with kidney disease?: It can help with hydration, since wet food carries far more moisture than dry kibble of the same weight, and some dogs find it more appealing when their appetite has dropped. It is not a substitute for a prescribed renal diet, but it is a reasonable thing to raise with your vet as part of the wider plan.
My dog won't eat the prescription diet my vet gave us — what should I do?: Speak to your vet rather than mixing in something else without asking. Many practices carry more than one renal diet and more than one format — wet, dry, different flavours — precisely because palatability is a real problem with these diets, and there is usually another option worth trying before giving up on the approach altogether.

Sources

Written against guidance published by UK veterinary and welfare organisations. Always confirm specifics with your own vet.

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.