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How Much Should You Feed a Cat? A Practical Guide to Portions, Meals and Weight

Good to know: general information, not veterinary advice. Read our disclaimer.
Photo of a tabby cat eating from a bowl next to a kitchen scale and measuring scoop

Short answer: there is no single amount that suits every cat. Start with the feeding guide on the food packet, weigh the food instead of using a scoop, check your cat's weight and body shape regularly, and adjust with your veterinarian's help. Keep treats to no more than 10 to 15 percent of daily calories, and split the daily ration into several small meals.

"How much should I feed my cat?" is one of the most common questions new owners ask, and one of the hardest to answer in grams. Cats differ in age, size, activity, neutering status, and health, so the right amount for your neighbor's cat may be wrong for yours. This guide explains how to find the right portion for your own cat, how often to feed, what to do about wet versus dry food, how to spot a weight problem, and how to change food safely. Everything below comes from Cornell Feline Health Center, International Cat Care, and PDSA guidance, listed at the end.

Why there is no universal number

The Cornell Feline Health Center says that cats vary greatly in how much food they need, and recommends asking a veterinarian for your cat's ideal body weight and for feeding adjustments. None of the sources we used gives a gram or calorie amount that fits every cat. That is not a gap in the advice: it reflects the fact that a young active cat, a neutered indoor cat, and a senior cat can need very different amounts.

What the sources do agree on is the method:

  1. Use the feeding guide on the packet as a starting point.
  2. Weigh your cat and watch their body condition.
  3. Adjust the portion up or down to keep your cat at an ideal weight.
  4. Ask your vet if you are unsure.

Step 1: start with the packet, and weigh the food

International Cat Care advises following the packet guidance as a starting point, then adjusting to keep the cat at an ideal weight and body condition. PDSA suggests weighing your cat's daily portion at the start of the day and using the feeding guidance on the food packet.

Weighing matters more than it sounds. International Cat Care points out that weighing dry food takes less than a couple of minutes and helps prevent weight gain, because dry food is very energy-dense. In its advice on obesity, it also warns that scoops are easy to overfill, so use kitchen scales instead.

Check the label for the life stage the food is made for. Cornell notes that cats' needs change across kittenhood, adulthood, pregnancy, and lactation, and that a food should state which life stage it is complete for. International Cat Care adds that you should look for a food labelled "complete," meaning it meets all of the cat's nutritional needs.

Step 2: weigh your cat and check their body shape

International Cat Care recommends weighing cats regularly, using cat scales or baby scales. PDSA likewise suggests regular weighing to spot weight gain early and adjust the diet.

A weight number alone is not always enough, because the ideal weight depends on age and breed. Vets often use a body condition score from 1 to 5, where 3 is ideal and 5 is obese. According to International Cat Care, an obese cat has a thick layer of fat over the ribs that is hard to feel, fat over bony areas, a pendulous belly "skirt," and no visible waist. A cat is considered overweight when they are 10 to 19 percent heavier than their ideal weight.

Being too thin matters too. The same source notes that research links both obesity and being too thin to a shorter lifespan, so do not aim for "as light as possible."

How often should you feed your cat?

The sources describe slightly different approaches, and all of them are about the pattern more than the total.

  • Little and often. International Cat Care suggests dividing the daily ration into at least five portions across the 24 hours, using timed and puzzle feeders. It notes that feral cats can spend more than 12 hours of every 24 hunting and catching food. It also warns that unrestricted access to food can lead to obesity.
  • Grazing or two meals. PDSA says many cats prefer to graze, with food available through the day. If your cat eats the whole daily allowance at once and keeps begging, it suggests splitting the allowance into two meals.
  • Kittens need several small meals. PDSA says most can move to two meals a day by about six months.

Whichever approach you use, the daily total is the same. Do not simply top up the bowl whenever it looks empty.

Puzzle feeders

International Cat Care says puzzle feeders make meals last longer, increase the effort needed to eat, and give mental stimulation. They are a practical way to split a ration into many small portions without being home all day, and they can help bored indoor cats. For more ideas, see our guide to keeping a Russian Blue happy and mentally stimulated.

Wet food, dry food, or both?

The sources agree that a good-quality commercial complete food is the safest base. International Cat Care says home-prepared diets are extremely difficult to balance, so a commercial food is ideal, at least as a major part of the diet.

On wet versus dry, the advice differs slightly:

  • International Cat Care recommends that healthy cats eat a mix of wet and dry food so they do not become accustomed to only one type.
  • PDSA says either works, or a mix, unless your vet advises otherwise. It adds that wet food can increase water intake in cats that do not drink much.
  • Cornell explains the difference in moisture: dry food contains 6 to 10 percent water, semi-moist about 35 percent, and canned at least 75 percent. It says the choice between them is largely a matter of what the cat prefers, and that dry and semi-moist foods can be left out for free-choice feeding.

If you want a breed-specific look at the pros and cons, read our guide to wet food versus dry food for a Norwegian Forest Cat.

Why cats need meat-based nutrition

Both Cornell and International Cat Care describe cats as obligate carnivores. International Cat Care explains that cats need much more protein than people or dogs, plus nutrients that plants do not supply, including taurine, arginine, vitamin A, and animal-origin fatty acids. This is one reason a well-made complete cat food matters. Breed-specific nutrient guides, such as our articles on Ragdoll nutrients, Havana Brown nutrition, and vitamins and minerals for a Chartreux, can help you see how these basics apply to a particular cat.

Water

Cornell and PDSA both say that clean, fresh water should be available at all times. PDSA adds that some cats prefer their water and food bowls kept apart. International Cat Care suggests two or three feeding and watering areas per cat, kept separate from litter trays, entry points, and busy areas.

Treats: the 10 to 15 percent rule

Cornell and PDSA agree: keep treats to no more than 10 to 15 percent of your cat's daily calorie intake. PDSA suggests cutting back main meals on treat days, and choosing healthier options such as cooked white fish, chicken, or turkey breast. It advises avoiding high-fat treats, milk, and raw meat.

The International Cat Care obesity advice also recommends cutting back on treats and table scraps, since energy-dense food left freely available, extra treats, and human food all add calories.

Life stages: kitten, adult, senior

  • Kitten (first year). Kittens need kitten food, not adult cat food, because their nutritional needs are higher, according to International Cat Care. Weaning usually starts around 3 to 4 weeks of age and is usually completed by around 8 weeks. PDSA says kittens start solid food from about 3 weeks.
  • Adult (about 1 to 10 years). This is also the age range when cats are more likely to become overweight, according to International Cat Care, which says cats aged roughly 2 to 10 are most at risk.
  • Senior (from around 11 years). PDSA notes that diet needs change, and that reduced eating or increased drinking can signal health problems. A senior cat that changes its eating habits should see a vet.

Neutering changes the numbers

International Cat Care says neutering lowers metabolic rate by about 20 percent, so neutered cats need less food. Low activity, especially in indoor cats, raises the risk further. If your cat was recently neutered, review the portion rather than keeping the kitten ration going.

Signs your cat is getting too much or too little

Watch for these signs:

  • Gaining weight or losing the waist, and ribs that are hard to feel under a layer of fat.
  • Begging after meals. PDSA suggests splitting the daily allowance into two meals if your cat finishes it all at once and keeps begging.
  • Losing weight without a plan, eating less, or drinking more than usual. These can signal a health problem, especially in older cats, so contact your vet.

If your cat is overweight

International Cat Care lists several conditions that obesity can cause or worsen, including diabetes, lower urinary tract disease, osteoarthritis, non-allergic skin disease, hepatic lipidosis (fat in the liver), and respiratory disease. Weight loss is worth doing, but it needs to be done carefully.

  • Do not cut food drastically without a vet. Sudden restriction can make cats ill, and health checks may be needed first.
  • Go gradual. Rapid weight loss can cause hepatic lipidosis, which can be fatal. A severely overweight cat may take up to a year to reach ideal body condition.
  • Measure portions on kitchen scales, cut back on treats and table scraps, and use puzzle feeders.
  • Add play. Wand toys and balls help. Older cats with sore joints may need pain relief first.
  • Ask about a plan. Vets can create a plan combining feeding, exercise, and monitoring, and may recommend a specialised diet that reduces hunger while still meeting nutritional needs.

For a breed example, see our guide to managing a Russian Blue's weight.

Foods to avoid

  • Toxic foods: PDSA lists grapes, raisins, garlic, onions, chives, leeks, shallots, scallions, and moldy food waste. If your cat eats any of them, contact your vet.
  • Milk and dairy: Cornell and PDSA both note that many cats are lactose-intolerant.
  • Raw meat: Cornell says raw meat can carry toxoplasmosis and other infections.
  • Canned fish made for humans: Cornell says these have been linked to neurological disorders in some cats.
  • Supplements: Cornell says they are usually unnecessary with a balanced, complete diet, and should not be given without veterinary approval.

How to set up the feeding area

International Cat Care suggests shallow bowls or saucers, made of glass or ceramic rather than plastic, which can hold odors. Avoid strong scents near food. If your cat is eating less, warming the food slightly may help, as cats prefer food at around 35°C. Keep feeding areas away from litter trays and busy spots.

How to change your cat's food safely

A sudden change of diet can upset a cat's stomach. If you need to switch, both sources recommend going slowly: offer the new food beside the old, and gradually reduce the old food as the new one is accepted. PDSA suggests about 14 days, with at least 3 days of happy eating at each step. For more detail, see International Cat Care's advice on gradual switching, which suggests starting with about 75 percent old food and 25 percent new, and letting the cat set the pace. If vomiting or diarrhea follows, read our guide on cat vomiting and when to call the vet.

Frequently asked questions

How many times a day should I feed my cat?

International Cat Care suggests at least five small portions across the day, using timed and puzzle feeders. PDSA says many cats graze, or can do well with two meals a day. Kittens need more frequent meals. The right pattern depends on your cat and your routine.

Is it okay to leave dry food out all day?

Cornell says dry food can be left out for free-choice feeding. International Cat Care warns that unrestricted access to food can lead to obesity. If your cat gains weight, measure a daily portion and spread it out.

Do neutered cats need less food?

Yes. International Cat Care says neutering lowers metabolic rate by about 20 percent, so neutered cats need less food.

Can I give my cat milk?

Cornell and PDSA both advise against it, because many cats are lactose-intolerant.

How do I know if my cat is a healthy weight?

Weigh your cat regularly, and ask your vet for a body condition score. A score of 3 out of 5 is ideal. You should be able to feel the ribs without a thick fat layer, and your cat should have a visible waist.

Can I feed my cat a home-made diet?

International Cat Care says home-prepared diets are extremely difficult to balance, so a good-quality commercial complete food is ideal. If you want to prepare food at home, talk to your vet first.

Quick checklist

  • Start from the packet guide, and weigh the food on kitchen scales.
  • Weigh your cat regularly and check their body shape.
  • Split the daily ration into several small meals, using puzzle feeders if you can.
  • Keep treats to 10 to 15 percent of daily calories at most.
  • Offer fresh water at all times.
  • Reduce portions after neutering, and review them as your cat ages.
  • Change food gradually over about two weeks.
  • Ask your vet before any strict diet or major change.

Keep reading

Sources

Further reading

Reminder: Kittyslovers (The Best Kitty Corner) is an independent blog. Our authors are not veterinarians and this article has not been reviewed by a veterinary professional. Always consult a licensed veterinarian about your cat's health, diet, supplements and medication. Found an error? Let us know.