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Prescription Cat Food: Renal, Urinary, Hepatic and Gastro Diets

A prescription cat food is not a premium cat food. It is a food built to do one job for one diagnosed problem, and the thing that makes it work is usually the thing that is restricted rather than the thing that is added. That also means the wrong one does harm. This page covers what each diet is for, the two things about liver diets in cats that are the opposite of what people expect, how to get a fussy cat to actually eat one, and when you need to talk to your vet first.

What Makes a Diet a Prescription Diet

An ordinary cat food is designed to keep a healthy cat healthy. It has to be complete and balanced for a normal animal, and the rules it is built to are deliberately safe for every cat.

A prescription diet breaks those rules on purpose. A renal diet has less phosphorus than a healthy cat should have. A urinary diet changes the acidity of the urine. A hypoallergenic diet uses a protein the cat's immune system has never met. Each of those is a benefit to the cat that needs it and a problem for the cat that does not.

That is the whole reason a vet has to be involved. Not because the food is dangerous in the way a drug is, but because it is aimed at a diagnosis, and you cannot aim it without one. A cat that is drinking more and losing weight might have kidney disease, an overactive thyroid or diabetes. Those three need three different foods, and guessing wrong costs you months.

Which Prescription Cat Foods Are for What

Diet	What it is for	How it works
Renal	Chronic kidney disease	Restricted phosphorus above all, moderately reduced protein, added potassium, omega 3 and antioxidants. Phosphorus restriction is the part that protects the kidney
Urinary S/O and struvite	Struvite stones and crystals, cystitis	Alters urine acidity and mineral content so struvite dissolves and does not re-form. Also drives water intake
Hepatic	Liver disease	Highly digestible energy, controlled copper, added zinc, B vitamins and antioxidants. See the section below, because cats are not small dogs here
Gastrointestinal	Vomiting, diarrhoea, poor digestion, pancreatitis recovery	Highly digestible, moderate fat, added prebiotics
Hypoallergenic and ultra hypoallergenic	Food allergy, itchy skin, food-responsive gut disease	Hydrolysed protein, broken into pieces too small for the immune system to react to
Obesity and satiety	Weight loss under supervision	Lower calories with high fibre and protein, so the cat feels full while losing weight and keeps muscle
Diabetic	Diabetes mellitus	Low carbohydrate, high protein. Diet is a genuine part of the treatment in cats, not an afterthought
Recovery and convalescence	After surgery, illness or a period of not eating	Very energy dense and very palatable, so a small amount does a lot. Often syringe or tube fed

Hepatic Cat Food, and the Two Things People Get Wrong

Liver diets for dogs are famously low in protein. Copying that across to a cat is a serious mistake.

One. Do not restrict protein in a cat with liver disease. The Merck Veterinary Manual is blunt about it: in feline hepatic lipidosis, protein restriction compromises survival. Cats are obligate carnivores and they need a meat-based protein source with adequate arginine and taurine. Protein is only restricted when a cat has hepatic encephalopathy, and that is a decision your vet makes, not a general rule about liver food.

Two. A cat with liver trouble must keep eating, and that matters more than which bag you buy. Hepatic lipidosis, the fatty liver disease, is often triggered by a cat simply not eating for a few days, and overweight cats are the most at risk. So if you switch your cat to a hepatic cat food and it goes on hunger strike, that is not a fussiness problem you wait out. Go back to whatever it was eating and call your vet the same day.

What a good feline hepatic diet does instead: highly digestible calories so the cat gets energy without the liver working hard, controlled copper, added zinc, antioxidants including vitamin E, and B vitamins, because cats with liver disease run short of thiamine and cobalamin. Small frequent meals rather than one or two big ones.

Renal Diets, and Why Phosphorus Is the Word That Matters

Chronic kidney disease is the single most common serious illness in older cats, and a therapeutic renal diet is the intervention with the strongest evidence behind it.

The key ingredient is the one that has been taken out. Restricting phosphorus helps protect the remaining kidney tissue from further damage. Protein is moderately reduced, not slashed, because too little protein harms a cat as well. Renal diets also run high in potassium, antioxidants and omega 3 fatty acids, which is why a home-cooked "kidney diet" from the internet is not the same thing.

Do not put a healthy cat on a renal diet. Not the other cat in the house, not a kitten, not "just in case". A growing or healthy cat needs the phosphorus and protein that this food deliberately removes.

Getting a Cat to Actually Eat It

This is where most prescription diets fail, and it is almost never the food's fault. Cats form food preferences early and dislike change, and a cat that is already unwell associates whatever it eats with feeling ill.

1. Never switch on the day of the diagnosis. A cat that feels sick and is handed a new food will refuse that food forever. Wait until it is eating normally again
2. Take seven to fourteen days. A quarter new food for two days, then half, then three quarters, then all. Slower is fine
3. Warm it to body temperature. Smell drives appetite in cats, and cold food out of a fridge smells of almost nothing
4. Offer wet and dry versions of the same diet. Many cats refuse one and accept the other. Almost every therapeutic range here comes in both
5. Do not leave a rejected bowl down all day. Take it up after twenty minutes and offer fresh. Stale food teaches the cat that this food is bad
6. Feed it somewhere quiet, away from the other cats and away from the litter tray
7. If the cat has not eaten for 24 hours, stop and call the vet. In cats that is a medical problem, not a standoff. Appetite stimulants and assisted feeding exist and your vet can arrange them

At a Glance

What is here	Renal, urinary, struvite, hepatic, gastrointestinal, hypoallergenic, obesity, satiety, diabetic, recovery and convalescence diets for cats
Formats	Dry from 400gm to 2.5kg, cans from 85gm to 400gm, gravy pouches at 85gm, liquid recovery diets
Brands	Royal Canin, Vet Life, Calibra, Vivaldis, Avet, Reflex
Price range	₹102 for a single pouch up to ₹3,015 for a 2.5kg therapeutic bag
Advice	Free. Call any branch. Parel is open 24 hours

Related: Wet Food for Cats · Cat Food · Royal Canin · Wound & Pain Relief for Cats · Veterinary Diets for Dogs

Do You Need a Prescription to Buy One?

Being straight with you: these are foods, not controlled medicines, and nobody is going to stop you buying a bag. We would rather explain why you should not, than pretend there is a law doing it for us.

Get the diagnosis first. Every one of these diets is built around a restriction. A renal diet on a cat with a urinary problem, or a urinary diet on a cat with kidney disease, does not just fail to help, it can make things worse. The tests that tell you which one your cat needs are ordinary blood and urine tests.

We will ask what your vet said, and that is not a formality. If you tell us the diagnosis we can tell you which packs in that range exist, whether the wet version is worth adding, and what it will cost you a month. If you do not have a diagnosis yet, tell us that too and we will say so rather than sell you the wrong bag.

Cats on a therapeutic diet need rechecking. A renal cat is usually retested every three to six months, and the diet gets adjusted with the results. A diet is not a thing you set up once and forget.

Feeding One Diet in a Multi-Cat House

• The other cats will eat it. Assume this. A healthy cat eating a renal diet long term is getting less phosphorus and protein than it should
• Feed separately, in different rooms, at set meal times. Free feeding and a shared bowl make it impossible
• Watch the reverse too. The sick cat sneaking the healthy cat's ordinary food undoes the whole thing, and this is the more common failure
• Microchip-activated feeders solve it if you can get one. We do not stock them at present
• Tell your vet if it is not working. There is usually a compromise, such as a wet therapeutic diet at meal times plus a shared maintenance dry food, and it is better than the diet quietly failing

What Feline Prescription Diet Food Costs

Prices shown are what you pay on the site today. The number that matters is the cost per day, not the cost per bag.

Diet	Pack	Roughly per day, 4kg cat
Royal Canin Renal dry	2kg, ₹2,430	about ₹67
Vet Life Renal dry	2kg, ₹2,475	about ₹68
Vet Life Hepatic dry	2kg, ₹2,691	about ₹74
Royal Canin Urinary S/O dry	1.5kg, ₹1,966	about ₹72
Royal Canin Hypoallergenic dry	2.5kg, ₹3,015	about ₹66

Worked on a 4kg cat eating roughly 55 grams of dry food a day. Your cat may eat more or less. The point of the table is that the big bags land within a few rupees of each other per day, so the price on the shelf is a poor guide and the price per kilo is the real one.

Wet versions cost more per calorie and are worth it for a renal or urinary cat, because the water content is doing part of the work. Many people feed both.

Buy Prescription Cat Food in Mumbai and Navi Mumbai

We are a licensed veterinary pharmacy with four branches, so a diet your vet started today can be in your hand today.

• Parel, behind KEM Hospital, open 24 hours
• Mahim, behind Kohinoor Square
• Sewri
• Seawoods, Navi Mumbai

Order online for free delivery above ₹499 in Mumbai and same-day delivery across Mumbai and Navi Mumbai.

Looking for a Diet We Do Not Stock?

Ask us and we will arrange it. Therapeutic ranges are wide and no shop carries every pack of every one.

• WhatsApp +91 90044 85093 with the diet name, the pack size and your cat's diagnosis
• Email bark@animeal.in
• Call any branch. Parel is on +91 90041 57093, 24 hours

We will confirm availability, price and how long it will take before you commit. If we cannot get the exact one, we will tell you which equivalent diet from another brand does the same job, so you can check it with your vet rather than guess.

When to Stop and Call the Vet

• Your cat has not eaten for 24 hours. In a cat this is urgent, not stubbornness. A cat that stops eating can develop fatty liver disease within days
• Vomiting or diarrhoea that starts after a diet change and does not settle within a day or two
• Straining in the litter tray and passing little or nothing, especially a male cat. A blocked bladder is fatal within a day or two. Go now
• Sudden weight loss, or a jump in how much the cat is drinking, on an unchanged diet
• Yellow gums, yellow eyes or a yellow tinge to the skin inside the ears. This is jaundice and it needs same-day attention
• You are still feeding a therapeutic diet six months after the last blood test. Not an emergency, but book the recheck

Frequently Asked Questions

What is prescription cat food?

A food formulated for one diagnosed medical condition, where the effect usually comes from what has been restricted rather than what has been added. A renal diet has less phosphorus than a healthy cat should get, a urinary diet changes urine acidity, a hypoallergenic diet uses hydrolysed protein. Each helps the cat it is meant for and is wrong for a cat that does not have that condition.

Do I need an actual prescription to buy prescription cat foods?

These are foods rather than controlled medicines, so no law stops you buying a bag. What you do need is a diagnosis, because feeding the wrong therapeutic diet can make a problem worse. We will ask what your vet said, and if you do not have a diagnosis yet we will tell you so rather than sell you the wrong food.

What is the best hepatic cat food?

One that keeps the calories high and digestible, controls copper, adds zinc, antioxidants and B vitamins, and above all one your cat will actually eat. We stock Vet Life Hepatic for cats in both a 2kg dry bag and an 85gm can. Do not assume a liver diet should be low in protein: in cats, restricting protein can make things worse.

Should a cat with liver disease be on low protein food?

Usually not. In cats, protein restriction in hepatic lipidosis has been shown to compromise survival, and cats are obligate carnivores that need a meat-based protein source. Protein is only restricted when a cat has hepatic encephalopathy, and that is your vet's call rather than a general rule about liver food.

Is feline prescription diet food the same as premium cat food?

No. Premium food is better ingredients for a healthy cat. A prescription diet is a deliberate imbalance aimed at a disease. A premium food cannot replace a renal diet, and a renal diet is a poor choice for a healthy cat.

My cat will not eat the new diet. What do I do?

Slow the changeover to seven to fourteen days, warm the food to body temperature, try the wet version of the same diet, feed somewhere quiet away from other cats, and take up any rejected bowl after twenty minutes rather than leaving it. If the cat has eaten nothing for 24 hours, stop and call your vet, because in cats that is a medical situation.

Can my other cats eat it?

They should not, and they will try. A healthy cat on a renal diet long term gets less phosphorus and protein than it needs. Feed separately in different rooms at set meal times rather than free feeding, and watch for the sick cat stealing the healthy cat's food, which is the more common problem.

How long does a cat stay on a prescription diet?

For chronic conditions such as kidney disease, usually for life. For a gut upset or a recovery period, weeks. Either way the cat should be rechecked, typically every three to six months for a renal cat, and the diet adjusted to the results.

Wet or dry therapeutic food?

Both work. Wet is worth adding for renal and urinary cats because the water content is part of the treatment. Dry is cheaper per day and easier to measure. Many people feed both, and offering both versions of the same diet is also the easiest way to get a fussy cat eating.

Can you order a cat food prescription diet you do not have in stock?

Yes. WhatsApp +91 90044 85093 with the diet name, pack size and your cat's diagnosis. We will confirm price and timing before you commit, and tell you which equivalent from another brand does the same job if we cannot get yours.

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