The Best Diet Cat Food

Everyone knows that maintaining a healthy weight is a key part of your feline living a long and healthy life. But, it is not uncommon for cats to struggle with their weight, especially if they live indoors. According to the Association for Pet Obesity Prevention, 60% of cats were classified as overweight, and that statistic is only rising. If your feline friend needs to lose weight, a change in diet and increasing activity are two of the major ways that go about decreasing your cat’s weight. Diet cat food can be a great option for cat owners with overweight cats.

Not all cat foods are made equal, however. On our search for the best diet cat foods on the market, we reviewed dozen of products. We looked at features such as taste, calorie count, ingredients, nutritional completeness, and customer reviews when rating each product.

Top pick
Blue Buffalo Weight Control for Adult Cats

Meet Blue Buffalo’s Weight Control food for Adult Cats, one of the best diet cat foods on the market.

$19.99 USD

Blue Buffalo Weight Control for Adult Cats easily pushed its way to the top of our list as the best diet cat food available on the market. It is made with only wholesome ingredients like whole grains and veggies, with no chicken by-product meal. Plus, this food is extremely palatable and tasty for cats, a feature that many diet cat foods don’t have.

The 5 Top-Rated Diet Cat Foods for 2018

Editor's PicksBrandRating
Best OverallBlue Buffalo Weight Control for Adult Cats4.4
Runner UpHill's Science Diet Cat Food for Healthy Weight and Weight Management4.3
Best Budget BuyIAMS Proactive Health Cat Food4.5
Best Dry Diet Cat FoodBLUE Wilderness Weight Control Cat Food4.5
Best Wet Diet Cat FoodHill’s Science Diet Wet Cat Food for Perfect Weight4.3

*Ratings are from Amazon at the time of publication and can change

Our Top Pick: Blue Buffalo Weight Control for Adult Cats

Blue Buffalo Weight Control for Adult Cats is made with only the finest ingredients and is enhanced with necessary vitamins and minerals to provide your feline with optimal nutrition. While many diet cat foods achieve their diet status by getting rid of key nutritional components, this cat food by Blue Buffalo allows for weight loss without cutting corners on nutrition. Containing only whole meat, whole grains, fruit, and vegetables, this cat food avoids many of the synthetic, artificial ingredients that are commonly found in cat food. It also contains LifeSource Bits, which are small pieces of kibble enhanced with vitamins, minerals, and antioxidants. These whole ingredients combined with enhanced vitamins and minerals provide your feline with a broad, complete nutrition.

While all Blue Buffalo cat foods are high-quality, this blend is particularly suited for overweight cats or those who need a little extra help maintaining their weight. With high amounts of protein and minimal carbohydrates, this blend is formulated specifically to lessen your cat’s caloric intake and allow them to lose weight easily without starving them to death. Many customers reported that their cat naturally ate less of this food than other brands simply because it was so filling! If you’re looking for cat food that encourages your cat to lose weight without starving them, this is a great choice!

Blue Buffalo Weight Control for Adult Cats Key Features:

  • No Chicken by-product meal
  • Formulated for weight loss
  • LifeSource Bits provide enhanced vitamins and minerals
  • Contains only wholesome ingredients

Our Runner Up Pick: Hill’s Science Diet Cat Food for Healthy Weight and Weight Management

Runner Up

As the name suggests, Hill’s Science Diet Cat Food for Healthy Weight and Weight Management is made to both help your cat reach a perfect weight and maintain it afterward. If your cat has gotten older or slowed down, it is likely that they might be packing a couple of extra pounds than they need. This diet cat food is designed to help them shed that extra weight to live the fullest life they possibly can. This cat food is both effective and fast. Over 70% of cats were reported to have lost weight within ten weeks when fed this diet as instructed.

Like our top pick, this cat food is made with only natural ingredients and is free from artificial colors, flavors, and preservatives. Despite this, however, it still tastes good. Many customers reported that their cats preferred this brand over other brands. It is only made with high-quality ingredients, including real chicken, lamb, or salmon depending on what flavor you get. This cat food also contains a clinically proven blend of antioxidants as well as many other important nutrients to ensure that your feline is getting complete nutrition despite being on a diet cat food. If you still aren’t convinced, this Hill’s Science Diet offers a 100% satisfaction guarantee on all their products, so you don’t risk anything if you try a bag!

Hill’s Science Diet Cat Food for Healthy Weight and Weight Management Key Features:

  • Only natural ingredients
  • Proven effective
  • Includes antioxidants
  • 100% satisfaction guarantee

Best Budget Pick: IAMS Proactive Health Cat Food

Budget Pick
IAMS Proactive Health Cat Food

For cat owners on a budget whose feline needs to shed a few extra pounds.

$12.99 USD

Even if you’re on a budget, you can still purchase your cat a high-quality diet cat food. IAMS Proactive Health Cat Food is formulated to help your indoor cat remain a healthy weight. As you might know, indoor cats tend to get less exercise than cats who are allowed outdoors. This lack of exercise means that your indoor feline might become overweight easier and faster than an outdoor cat would. Because of this, it is not uncommon for indoor cats to need a bit of specialized help to ensure that they reach and maintain a healthy weight. This cat food provides that extra help.

This diet cat food is made with high-quality ingredients, including chicken. This high-quality protein provides your cat with key amino acids that allow them to shed fat without losing lean muscle. Cats with more lean muscle burn more calories than those with more fat, even when at rest. This feature helps your cat burn more calories than they would otherwise, which helps them shed the pounds they need to.

On top of helping your feline lose weight, this cat food also contains a fiber blend that reduces instances of hairballs. Any cat can benefit from this feature, even if they don’t necessarily need to lose that much weight.

IAMS Proactive Health Cat Food Key Features:

  • 100% balanced nutrition
  • Formulated for weight loss and hairball reduction
  • Contains amino acid
  • Chicken is a key ingredient

Best Dry Diet Cat Food: BLUE Wilderness Weight Control Cat Food

Best Dry Diet Cat Food
BLUE Wilderness Weight Control Cat Food

With a high-protein formulation and limited ingredients, this cat food is a good option for cats with sensitive digestion systems or food allergies.

$25.34 USD

BLUE Wilderness Weight Control Cat Food is about as close to your cat’s natural diet as you can get. This recipe is created to be high-protein and grain-free. Cats are obligatory carnivores and are not designed to eat large amounts of grain. However, many low-quality cat foods contain a lot of grain as a filler, and it is not uncommon for cats to have a moderate reaction to this ingredient. Plus, grain is also almost completely carbs, which does not match up with a cat’s natural high-protein, high-fat diet. This excess grain consumption can easily cause them to become overweight. If you cat has symptoms of having a food allergy or is overweight, eliminating grain from their diet can help their quality of life and help them return to a healthy weight.

On top of the grain-free feature, this diet cat food also contains LifeSource Bits, which are specially designed pieces of kibble that are full of vitamins, minerals, and antioxidants. All of these ingredients help to improve your cat’s overall health and ensure that they receive all the nutrients they need even though they might be eating less cat food than they’re use too. This diet cat food is densely packed with nutrition, so there is no need to worry about your cat missing out on key vitamins and minerals.

 BLUE Wilderness Weight Control Cat Food Key Features:

  • Grain-free
  • High-protein
  • No artificial ingredients
  • Contains sweet potatoes as a healthy carbohydrate

Best Wet Diet Cat Food: Hill’s Science Diet Wet Cat Food for Perfect Weight

Best Wet Diet Cat Food
Hill’s Science Diet Wet Cat Food for Perfect Weight

If you liked our Runner-Up pick but prefer wet cat food, then this is the product for you.

$30.43 USD

Featuring a similar formulation to our Runner-Up pick, Hill’s Science Diet Wet Cat Food for Perfect Weight is proven to help cats lose and maintain a healthy weight. Some cats simply eat and tolerate wet food better. Plus, suddenly changing a cat from wet to dry food can be detrimental and cause all sorts of short-term digestive problems, which we are sure you don’t want to have to clean up. Luckily, Hill’s Science Diet also offers their diet cat food in a wet form. Now, you don’t have to worry about whether you should risk switching your overweight cat from wet to dry food. You can just use this product instead.

Customers loved that this product was scientifically proven to be effective. Over 70% of cats who use this wet diet cat food as directed for ten weeks will lose weight. Like most diets, the longer you leave your cat on it, the more effective it will be. Because cats are sensitive to changes in their food, the manufacturer recommends switching to this food slowly and feeding it to your cat for as long as possible.

Unlike many diet cat foods, this product was formulated to work for cats of all breeds and weights. If you have a multi-cat household, this is probably your best option to ensuring that all your cats remain a healthy weight without the added stress of separating them at mealtime.

Hill’s Science Diet Wet Cat Food for Perfect Weight Key Features:

  • Scientifically proven
  • Extremely soft
  • 100% complete nutrition
  • Designed to help all cats remain a healthy weight

Who Should Buy Diet Cat Food

In the U.S., more and more cats are becoming overweight. As you probably know, an overweight cat can experience not only mobility problems but also a number of other detrimental health problems that can slowly chip away their quality of life. Cats who are overweight will often only put on more pounds when left to their devices. After all, overweight cats or less likely to move and be active, which only lowers the number of calories they burn on a daily basis. Because cats will often not lose weight by themselves, it is up to their owners to put them on a diet and exercise plan that encourages weight loss and helps their feline maintain a healthy weight. Any owner who suspects that their cat needs help with their weight should purchase a diet cat food.

If you think your cat might be overweight, it is always a good idea to get them checked out by their veterinarian. If their status is confirmed, a diet cat food is almost always the best way to encourage them to lose weight as long as they don’t have any other health problems. Of course, not all diet cat foods are made the same. We suggest trying one of the diet cat foods on our top five list for the best possible results.

Top pick
Blue Buffalo Weight Control for Adult Cats

Meet Blue Buffalo’s Weight Control food for Adult Cats, one of the best diet cat foods on the market.

$19.99 USD

Important Features to Consider

A diet cat food should do several things well. Here is what you should consider when choosing a diet cat food for your feline:

  • Nutrition. While a diet cat food should contain fewer calories, it should not contain fewer nutrients. Just because your cat is on a diet does not mean that they need fewer nutrients than before. In fact, the reverse is often true. Because your cat is probably eating less cat food than previously, choosing a nutritionally dense diet cat food is necessary to ensure that they get full and do not constantly feel hungry. Always check that a diet cat food provides complete nutrition before purchasing it.
  • Taste. Just like human diets, many diet cat foods can be unappetizing. If your cat refuses to eat the diet cat food, it probably isn’t going to do them much good. So, it is important to make sure that the diet cat food you pick is at least somewhat tasty. If you have a pickier cat, you should probably pay particular attention to how the diet cat food tastes.
  • Wholesome ingredients. Most of the time, whole, natural ingredients are better than artificial ones. Sometimes, diet cat foods will attempt to cut down on the calorie count by including incomplete, artificial ingredients. We recommend always checking the ingredient list on the bag before choosing a diet cat food for your feline friend. If something sounds sketchy, it probably is.

Frequently Asked Questions

What is a healthy weight for a cat?

How much your cat should weigh depends heavily on their size, breed, and gender. In general, most domestic cats should weigh about 10 pounds. Of course, if your feline is a large species of cat such as a Maine Coon, they are probably going to weigh more than smaller sized cats. According to the Association for Pet Obesity Prevention, just because your cat does not meet traditional weight standards does not necessarily mean that they are overweight. Some cats have more lean muscles than others and might exceed the suggested weight for their size despite not having much body fat. In these cases, your cat might not need to lose weight at all.

If you expect that your cat might be overweight or have a few extra pounds of fat, you should speak to your veterinarian. Performing a few simple tests will allow them to determine exactly how much your cat should weigh and whether or not you should put your cat on a diet cat food.

How do I know if my cat is overweight?

Only your veterinarian can tell you for sure whether or not your cat is overweight. However, there are a couple of signs you can look for at home that might signal it’s time to start your cat on a diet cat food. One of the most obvious signs is an excess of body fat hanging off of your feline. If your cat has fat rolls, they are probably overweight. Your cat’s activity level might clue you into whether or not they are overweight as well. Cats who are generally inactive are more likely to be overweight, and cats that are overweight are more likely to be inactive. So, if your cat lays around all day, it might be time to take them to the vet for a checkup.

Another way to tell if your cat is overweight is by feeling for their ribs. You should be able to feel your cat’s ribs easily but not see them. If you cannot feel your cat’s ribs or they protrude outward, then your cat is not at a healthy weight, and you should make an appointment with a veterinarian. It might also be helpful to look at a body condition score for your cat. While these aren’t fool-proof, they can be useful by giving you something to compare your cat too.

How do I get my indoor cat to lose weight?

Indoor cats are usually less active than their outdoor counterparts. However, this does not mean that it is impossible to keep your feline at a healthy weight. Many indoor cats who are overweight will easily begin to shed the pounds if you put them on a diet cat food. On top of diet management, it is also recommended that you encourage them to exercise. This can be done through play or even walking your cat outside if possible.

How can I put my cat on a diet?

Trying to self-manage your cat’s diet can be complicated. After all, if you simply restrict the amount of food they consume, it is likely that they will miss out on key vitamins and minerals. Instead, opt to put your cat on a diet cat food and follow the feeding instructions closely. You might not want to switch your cat’s food abruptly since it can cause digestive problems and turn your cat off of their new food. Slowly switch to the new diet cat food over a week or so by mixing it in your cat’s old food in slowly increasing amounts.

Other Diet Cat Food We Reviewed

Top pick
Blue Buffalo Weight Control for Adult Cats

Meet Blue Buffalo’s Weight Control food for Adult Cats, one of the best diet cat foods on the market.

$19.99 USD

We also looked at 20 other diet cat food. Even though they did not make our top 5 best diet cat food list, they’re the best of the rest and still worth considering. All the information you’ll need for comparison is included with each listing.

Wet Diet Cat Foods

NomNomNow Chicken Chow-Meow

NomNomNow Chicken Chow-Meow

This all natural, grain free cat food recipe contains chicken thigh, breast and liver, asparagus, carrots, cantaloupe, and spinach. It’s a great protein-rich option for cats of all shapes and sizes.

Key Features:

  • High protein recipe
  • Gluten free
  • Contains nutritious vitamins, minerals, and fiber

Cost: Visit site for price

Blue Natural Weight Management + Urinary Care

Blue Natural Weight Management + Urinary Care

For cats who already have underlying health problems, maintaining a healthy weight can be extremely important. If your cat has urinary problems, this diet cat food can help them maintain a healthy weight.

Key Features:

  • Supports weight loss without compromising urinary health
  • Contains added vitamin and minerals
  • No poultry by-product meal

Cost: $65

Canidea Grain-free Diet Cat Food

Canidea Grain-free Diet Cat Food

Featuring salmon as the first ingredient for quality protein and gentle digestion, cats love this cat food despite its low-calorie count.

Key Features:

  • Salmon as the first ingredient
  • Textured to encourage consumption
  • Free of grains, potatoes, and carrageenan

Cost: $30

Hill’s Prescription Diet Digestive plus Weight Management

Hill’s Prescription Diet Digestive plus Weight Management

Designed to help your pet lose weight while also supporting their digestive system, this is a great choice for overweight cats who also have a sensitive stomach.

Key Features:

  • Clinically tested
  • Prescription strength
  • Delicious

Cost: $59

Hill’s Prescription Diet Metabolic for Cats

Hill’s Prescription Diet Metabolic for Cats

This diet cat food is designed to help even the largest cats lose weight healthily and consistently. If your cat needs to lose weight right now, you might want to try this product.

Key Features:

  • Prescription strength
  • Proven effective
  • Balanced nutrition

Cost: $50

PetGuard Weight Management Cat Food

PetGuard Weight Management Cat Food

Made of only natural ingredients, this cat food is a great option for any cat that needs to lose a couple of extra pounds. Plus, it is extremely affordable.

Key Features:

  • Limited fat and calories
  • Free of tuna, by-products, artificial colors, flavorings, sweeteners, sugar, and preservatives
  • Low in magnesium

Cost: $11

Purina OM Savory Select Overweight Management Cat Food

Purina OM Savory Select Overweight Management Cat Food

This diet cat food helps your pet lose weight without making them feel like they’re starving. With high protein and fiber, this cat food fills your cat up without relying on fat-building carbohydrates.

Key Features:

  • High protein and fiber
  • Low fat and carbohydrates
  • Optimal nutrition

Cost: $53

Purina Pro Plan Wet Cat Food

Purina Pro Plan Wet Cat Food

Featuring a weight management blend that contains optimal protein level to encourage healthy weight loss, this diet cat food is great at helping your cat lose weight in a healthy, sustainable manner.

Key Features:

  • Made with real turkey
  • Great taste guaranteed
  • Supports a healthy immune system

Cost: $22

Dry Diet Cat Foods

Hill’s Prescription Diet Feline Metabolic Advanced

Hill’s Prescription Diet Feline Metabolic Advanced

Does your cat need to lose weight quickly or just not responding to other diet cat foods? Then you need to give this a try. While it is somewhat expensive, it is one of the most effective diet cat foods on the market.

Key Features:

  • Prescription Strength
  • Tasty
  • Works very quickly

Cost: $65

Merrick Limited Ingredient Diet Cat Food

Merrick Limited Ingredient Diet Cat Food

This grain-free, limited ingredient diet cat food is a great option if your cat needs to lose weight but has a sensitive stomach that can’t tolerate some of the other diet cat foods on the market.

Key Features:

  • Real deboned salmon
  • Grain-free
  • Poultry-free

Cost: $33

Natural Balance Fat Cats

Natural Balance Fat Cats

As the name suggests, this cat food was formulated for fat cats. With complete nutrition and vitamins to support healthy digestion, this diet cat food helps your pet lose weight by cutting their calories and helping them digest food more effectively.

Key Features:

  • Special protein and fiber blend
  • Balanced nutrition
  • Tasty

Cost: $17

Natural Balance Limited Ingredient Dry Cat Food

Natural Balance Limited Ingredient Dry Cat Food

If your cat has a food allergy, it can be difficult to find a balanced diet cat food that helps them lose weight without upsetting their stomach. Luckily, this diet cat food is designed to do just that.

Key Features:

  • Limited ingredient
  • Grain-free
  • High-quality salmon

Cost: $29

Nutro Weight Management

Nutro Weight Management

With added vitamins, minerals, and other nutrients, Nutro Weight Management for cats promises to help your feline shed a few extra pounds without sacrificing their nutrition.

Key Features:

  • No chicken by-product meal, corn, soy, artificial flavors, or artificial preservatives
  • Delicious
  • 100% satisfaction guarantee

Cost: $35

Purina Pro Plan FOCUS Weight Management Cat Food

Purina Pro Plan FOCUS Weight Management Cat Food

Featuring 46% protein and 20% less fat than most cat foods, this diet cat food is effective while remaining affordable.

Key Features:

  • Budget-friendly
  • Natural prebiotics included
  • High-quality protein

Cost: $18

Wellness Complete Health Dry Cat Food

Wellness Complete Health Dry Cat Food

This all-natural cat food features a reduced calorie formulation without sacrificing taste or necessary nutrients. It contains absolutely no wheat, corn, soy, meat by-products, artificial flavors, colors or preservatives.

Key Features:

  • All-Natural
  • Made in the USA
  • Delicious

Cost: $33

Diet Cat Treats

BLUE Wilderness Grain Free Cat Treats

BLUE Wilderness Grain Free Cat Treats

Consuming an unnatural amount of grain can cause cats to become overweight. Luckily, these can treats are grain-free and contain no poultry by-product meals, artificial flavors, or preservatives.

Key Features:

  • Made with real chicken
  • 100% grain free
  • Affordable

Cost: $4

CodderTots Natural Low-Calorie Cat Treat

CodderTots Natural Low-Calorie Cat Treat

These cat treats are made from 100% pure whitefish fillets, which are naturally low in calories. Give your cat what she’s been craving without sacrificing her weight!

Key Features:

  • Six calories per treat
  • High in protein
  • Single Ingredient

Cost: $14

Hill’s Prescription Diet Metabolic Treats

Hill’s Prescription Diet Metabolic Treats

Designed to control between-meal hunger, these cat treats can help your feline lose weight by keeping them full and preventing them from overeating.

Key Features:

  • Controls hunger
  • Prescription Strength
  • Tasty

Cost: $18

Northwest Naturals Freeze-Dried Cat Treats

Northwest Naturals Freeze-Dried Cat Treats

Like many of the diet cat treats we reviewed, these are freeze-dried and have very few ingredients. This product is also completely free from gluten and grain.

Key Features:

  • Includes muscle meat, organ meats, and natural raw ground bone
  • High-quality ingredients
  • No added fruits or vegetables

Cost: $12

PureBited Duck Freeze Dried Treats

PureBited Duck Freeze Dried Treats

Ideal for cats on restricted diets because of weight problems or digestive disorders, these treats contain only one ingredient. Plus, they are extremely affordable!

Key Features:

  • One-ingredient
  • Two calories per treat
  • Delicious

Cost: $4

Vital Essentials Freeze-Dried Cat Treats

Vital Essentials Freeze-Dried Cat Treats

It doesn’t get much more natural than this. This cat treat comes in a number of varieties, but they all have one thing in common – they’re single ingredient, freeze-dried, and low in calories.

Key Features:

  • Single Ingredient
  • Freeze-dried
  • Gluten and grain free

Cost: $5

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Kristin Hitchcock