10 Best Cat Foods for Weight Loss UK 2024 | Purina, Royal Canin and More

In all of our research, we couldn't find a better wet food suitable for weight loss than this. It has 44% less fat and 15% fewer calories than similar off-the-shelf brands, the protein level is very impressive for a wet food, and it's even available in a flavour other than chicken!

Having read through our list, you may be used to weight loss food costing a little more than usual, especially wet varieties, but this box of 12 mixed flavours is surprisingly cheap. We think it offers incredible value when compared with other dietary wet foods on the market today. 

While not explicitly marketed as a food for weight loss, switching your cat over to the Hills Science Plan brand is one of the best things you can do to get your cat down to, and maintain, a healthy weight.

This dry food is aimed towards cats aged 7+ (there is an option for 12+ too) and offers precise nutrition to older cats who perhaps aren't as active as they once were around the house or garden. Hills Science Plan foods also come in at an extremely competitive price point.

As the wet food equivalent of the above product, be sure to check with your vet before switching to this high protein, low-calorie food. We've placed the wet food slightly higher on our list as it's harder to find and we know that cats used to wet food can be rather picky!

The OM Obesity Management wet food is also high in fibre, like many others, ensuring your cat feels full for longer. We also think it represents very good value when compared to other veterinary wet foods on the market. 

The first thing you'll probably notice about the Purina Obesity Management food is the high protein content; this is to make sure that when losing weight your pet's muscles remain lean and strong. There are some very positive owner reviews after adopting overweight cats and switching to this brand.

As you may guess by the name, this food is aimed at making sure obese cats are able to slim down to a healthy weight. As with other specialist veterinary foods, please consult with your vet before switching them to this diet.

You're not going to do much better in terms of value than getting 2 kg of specialty cat food for under £10. This isn't some unknown, budget brand either, as IAMS have been making cat food for over seventy years and are one of the best in the business.

Containing 30% less fat than their regular adult diet, this option is an easy switch from similar dry foods. Many owners of particularly fussy felines have reported that their pets didn't notice any difference when switching to this option as part of a weight loss plan. 

The first wet food on our list is the alternative to the previous entry from Royal Canin. As you may have noticed, a lot of weight loss food tends to be dry because they can be bulked out with low-calorie ingredients. With wet food, that full feeling comes from the jelly.

The L-carnitine found in this food helps turn excess fat into energy, while the protein content ensures that there isn't any muscle loss from the decreased calorie consumption. If your cat only eats wet food, this is a great choice, but one of the more expensive ones.

Royal Canin's Light Weight Care is a very well-balanced dry food containing a special blend of fibre-rich ingredients to keep your pet feeling full. It also has a high level of enriched protein and a low fat and calorie content, not to mention that it's one of the cheaper weight loss foods on the market today.

The only possible downside is the size of the bags. As dry food lasts for a long time, it's often better to get a large bag to save money and 400 g will only last about a week. On the other hand, you won't have to spend a lot to try it out, and you could always bulk buy a few. 

This offering from Royal Canin is high in fibre and designed to help keep your cat feel full between meals to prevent weight gain through overeating. It's a great choice if your cat tends to beg for more food in between meals.

While this food doesn't require a vet's prescription, we strongly recommend that you speak to them before introducing this into your cat's diet. High fibre foods can cause stomach issues and constipation, so make sure to check and get the go ahead first.

You've probably come across Purina foods before, and they have a lot of products on the market that are labeled as veterinary diets; this is not one of those which means it is very cheap when compared with other weight loss foods, making it a good substitute for usual meals.

While having a high protein content, it also proudly advertises that it is rich in wheat which is an ingredient that divides opinion. Its champions claim it is a natural and great form of fibre, while detractors state that it's nothing but bulk and filler as felines cannot digest it properly. 

Hills are one of the leading brands when it comes to foods designed to regulate feline weight and all their products are developed with input from vets, animal nutritionists and scientists. This particular product works with your cat's natural ability to burn any excess fat to help it get down to a healthy weight.

We have to stress, however, that you should only use this product with your vet's permission as it's for obese cats rather than those that are slightly overweight. It is also important to only use it as long as your vet recommends, with regular checkups to monitor progress.