A cat that is only slightly overweight can still be carrying a meaningful health risk. Extra weight puts more strain on joints, can make grooming difficult and may complicate conditions such as diabetes. This cat weight loss example shows what a measured, vet-led plan can look like in a normal household, without crash dieting or relying on guesswork.

The figures are illustrative rather than a prescription. Every cat's starting weight, body condition, age, health and food requirements are different. Ask your vet to confirm a suitable target weight and daily calorie allowance before changing the diet, particularly if your cat is older, has a medical condition or takes medication.

The starting point: more than a number on the scales

Meet Mabel, a seven-year-old neutered domestic shorthair. She weighs 6.8kg and spends most of her day indoors, apart from short supervised periods in the garden. At her health check, the vet scores her body condition as overweight: her ribs are difficult to feel beneath a layer of fat, and her waist is not easy to see from above.

Mabel's estimated healthy weight is around 5.4kg. That does not mean she should lose 1.4kg quickly. Slow, steady loss protects her health and gives her family time to establish better feeding habits.

Before starting, Mabel's owner records everything she receives over seven days. This includes her complete dry food, wet food, dental treats, small pieces of chicken and the handful of biscuits left in a bowl for her to graze on overnight. This step often explains why a cat has gained weight. A food labelled as complete can still cause weight gain when the portion is too large for that cat's lifestyle.

The vet also checks for problems that could affect appetite, movement or weight management, such as dental pain, arthritis or diabetes. A sudden change in appetite or weight always needs veterinary advice rather than an automatic diet change.

Cat weight loss example: setting a realistic daily ration

Mabel's owner had been estimating portions using a scoop. Once weighed, her normal intake came to roughly 255 calories per day, before uncounted treats. Her vet recommends starting at 190 calories per day, based on Mabel's target weight, current condition and previous intake. The exact calorie figure is individual, which is why copying another cat's ration is not a reliable plan.

Her new daily allowance is split into three meals. She receives 120 calories of complete wet food, 55 calories of a suitable complete dry food and up to 15 calories for treats or food puzzle use. Every item is counted within the same daily total.

A kitchen scale is more accurate than a cup or scoop. Dry food is particularly easy to over-serve because a small extra amount can add a surprising number of calories over a week. Weigh the food in grams, check the calories per pouch, tin or 100g on the label, and keep the plan consistent.

If a cat prefers dry food, a dry-only plan can work if it is carefully measured. However, some cats find a higher proportion of wet food satisfying because it provides more moisture and volume for the calories. The best option depends on what the cat will eat reliably, their dental and urinary history, and the veterinary recommendation. Do not repeatedly swap foods just because the first few days bring complaints at the bowl.

The first four weeks: control the extras

Mabel does not need a dramatic exercise programme. Cats usually do better with short, frequent activity that suits their natural hunting behaviour. Her owner uses part of the measured dry allowance in a feeding puzzle and has two five-minute play sessions each day with a wand toy. The goal is to make meals take longer and add movement, not to exhaust her.

The household also agrees on one rule: nobody feeds Mabel outside her measured daily allowance. This matters more than it sounds. One person offering treats, another topping up the bowl and a child sharing toast can undo a carefully calculated feeding plan.

For cats in multi-pet homes, feed separately wherever possible. Microchip feeders, closed doors at meal times or supervised meals can prevent one cat finishing another's food. If there are dogs in the house, keep cat food and dog food out of reach of each other. It is difficult to manage calories when food is freely available from several bowls.

Mabel is weighed every two weeks on the same set of scales, at a similar time of day. Her owner writes down her weight, what food was fed and any changes in appetite, stools, mobility or behaviour. A simple record makes it easier for the vet to judge whether the plan is working.

What safe progress looks like

A common target is gradual loss of around 0.5% to 2% of starting body weight each week, but your vet may advise a different rate. For Mabel, a loss of about 35g to 135g weekly may be appropriate. The aim is a downward trend, not a perfect result every fortnight.

At the two-week check, Mabel weighs 6.70kg. She has lost 100g, is still bright and is eating her meals well. No adjustment is needed. At four weeks, she weighs 6.56kg. The plan is continued because the pace remains steady.

By week eight, Mabel weighs 6.30kg. Her owner notices that she is more willing to play and can groom the lower part of her back more easily. These are useful practical signs, but the scales and body condition assessment remain the main measures of progress.

At week 12, Mabel is 6.02kg. She has lost 780g over the period, which is worthwhile progress without an unsafe drop in weight. She has not yet reached her estimated goal, so the vet reviews the record and advises whether to continue the same allowance or make a small change. Weight reduction may take several months, especially where a cat has a substantial amount to lose.

When the plan needs changing

Do not reduce food further just because the result feels slow. Weight loss can level out as a cat becomes lighter, but the cause may also be inaccurate portions, treats, food theft or a change in activity. Check the basics first and discuss any alteration with the vet.

Contact a vet promptly if a cat stops eating, eats very little, becomes lethargic, vomits repeatedly or loses weight rapidly. Cats must not be starved. Going without adequate food can lead to serious liver disease, particularly in overweight cats.

A weight-management food can be useful where a vet recommends it, as these diets are designed to provide controlled calories while maintaining key nutrients. It is not the only route. A carefully measured complete food may be suitable for some cats, but it must meet their nutritional needs and be fed at the right amount.

Keeping the weight off after the target is reached

Reaching a healthy weight is not the point to return to old portions. Mabel will need a maintenance allowance, usually higher than her weight-loss ration but still based on regular weighing and her actual activity. Her owner continues to weigh meals, limits treats and checks her weight monthly.

It also helps to make feeding part of the household routine. Keep food scales near the storage container, use one named treat pot with a daily limit, and explain the plan to everyone who cares for the cat. Small habits are easier to maintain than repeated strict diets.

The most useful next step is simple: weigh your cat, look honestly at every calorie they receive, and book a veterinary check before cutting back. A controlled plan gives your cat a better chance of moving comfortably, grooming properly and staying at a healthy weight for the long term.