The worst cat food brands are filled with plant-based proteins, low-quality meat ingredients, and chemical preservatives.

It’s important to understand AAFCO’s label guidelines to compare cat foods properly.

We cannot rely on fancy label claims.

Watch the video version review of worst cat food brands

These are the worst cat food brands:

Disclaimer: Nothing I say is medical advice. I took all photos at local stores.

Before you read…

At the end of the day, YOU are responsible for your cat. And YOU have the option to feed or avoid whatever you want.

Just like these manufacturers have the option to produce these yucky foods.

Additionally, cats are sensitive to dietary changes. Transition cat food slowly if you decide to change the food.

I’m reporting the facts, based on these 4 things:

1. Cat food manufacturer

Not just the brand. But who is actually MAKING the products.

2. AAFCO product name rules

AAFCO cat food label rules tell us the minimum and maximum amount of the named ingredients.

3. AAFCO ingredient definitions

AAFCO states that meat by-products can include 4D meats (dead, diseased, dying, disabled) as long as the by-products are rendered.

Additionally, meat meals are rendered meats.

According to a CRS Report to Congress on animal rendering, rendered meats can include dead animals from feedlots, ranches, marketing barns, ANIMAL SHELTERS, and food waste from restaurants, groceries, and stores.

4. Guaranteed analysis

The NRC says that carbohydrates are not essential to the cat’s diet. AAFCO and FEDIAF also do not set minimum requirements for carbohydrates.

Unfortunately, AAFCO does not require carbohydrates on the guaranteed analysis.

So you must use a carb calculator and then convert to a dry matter basis to figure this out yourself.

If you don’t understand these facts, you will not understand this article. I get many comments about this article. But these are the facts.

Please educate yourself on AAFCO labeling requirements and definitions. And heavily research the manufacturer that’s making your cat’s food (not just the brand name).

Check the bottom of the article for the solution. I don’t just point out problems. I offer solutions too!

Mars Petcare cat food brands (Royal Canin, Sheba, Whiskas, Iams, Nutro, Temptations, Greenies)

Mars is a major conglomerate corporation that owns dozens of brands (human food and pet food).

You’re probably familiar with candy bars, gum, and frozen foods made by Mars.

M&Ms, Tasty Bites, Big Red, Combos, etc.

Let’s look at their cat food.

Royal Canin

royal canin cat food brand
  • Product name rule = no rule, no minimum requirement of meat
  • Carb amount = approx 46% dry matter basis
  • First 5 ingredients = Chicken meal, corn, brewers rice, chicken fat, wheat gluten

This food is marketed as oral care. It says it helps reduce dental plaque.

3 of the first 5 ingredients are carbohydrates. And almost half the food is made from carbohydrates.

Cats can’t produce amylase in their saliva. Amylase breaks down carbohydrates.

So cats can’t break down carbohydrates in their mouth. How can carbohydrates promote healthy cat teeth?

Also, there’s not much whole meat in this product.

Cats need meat to survive and thrive.

Additionally, phosphates and pyrophosphates are typically used as pet food flavor enhancer “palatants”. There are multiple phosphates in this product.

A study has shown that these inorganic phosphates, when given in excess, can cause renal issues in cats.

And this is a vet-recommended brand…

Greenies

greenies dental cat treats
  • Product name rule = flavor rule, no minimum requirement of meat
  • Carb amount = approx 48% dry matter basis
  • First 5 ingredients = Chicken meal, ground wheat, brewers rice, corn gluten meal, poultry fat

Greenies technically isn’t food. But a lot of vets recommend it for dental care.

These treats have even more carbohydrates. And again we see not much meat in the product.

Notice that the first 5 ingredients are almost identical to the “oral care” product mentioned above?

Check the label and you’ll see Mars Petcare US.

Temptations

temptations unhealthy cat treats
  • Product name rule = flavor rule, no minimum requirement of meat
  • Carb amount = approx 37% dry matter basis
  • First 5 ingredients = Chicken by-product meal, ground corn, animal fat, brewers rice, wheat flour

Temptations actually list feeding instructions.

Please, do not feed these to your cat. Avoid it as treats and as food.

Seriously. I cannot believe they recommend feeding this as a meal.

Again, we see the same first 5 ingredients.

The product name includes the words “chicken flavor”.

That means the product has no minimum requirement for chicken. And that minimum is guaranteed less than 3%.

If it contained at least 3% chicken, the product name would say “with chicken” instead of “chicken flavor”.

This is why learning cat food label rules is so important!

And you’ll see a big Mars Petcare on the label.

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Nestle cat food brands (Friskies, Fancy Feast, Beyond, Deli Cat, Muse, Kit & Kaboodle, Kitten/Cat Chow, Purina ONE, Purina ProPlan, Purina ProPlan Veterinary Diet)

Nestle is responsible for almost half the cat food brands on the market today.

Did you know this?

They’re also responsible for junk cereal, drinks, and chocolate.

Let’s look at their cat food.

Friskies wet

friskies wet cat food brand
  • Product name rule = with rule, 3% minimum requirement of meat
  • Carb amount = approx 23% dry matter basis
  • First 5 ingredients = Water, meat by-products, beef, wheat gluten, chicken

The name is “with beef in gravy”. The label shows a slice of beef.

Would you suspect chicken to be in this food? What about turkey and fish?

What about meat by-products? We have no idea what type of animal that is. And we have no idea what type of by-products this is.

During the slaughter and meat-cutting process, certain carcasses or parts may be rejected for human use and can be expected to be processed into animal feed. This may include meat that doesn’t meet aesthetic standards, or internal organs or other parts that normally aren’t used for human food.

AAFCO.

So by-products are leftovers that aren’t good enough for human consumption.

I agree that organs and bones are very nutritious for cats. My cat eats 100% raw including raw meaty bones, muscle meats, organs, and occasional whole prey.

But let’s think about it like this…

I can buy animal parts like liver, kidney, pig ears, chicken feet, pig skin, turkey tails, cow feet, entire rabbits, lamb heads, etc. at my local grocery store.

So what type of leftovers are going into cat food?

How do we know “meat by-products” in cat food are actually clean sources of these secondary products?

The manufacturer doesn’t even know what type of meat and what type of by-products they are using. So how can we know what it is?

Good-quality cat food products will list the exact meat and the by-products by name. The ingredients will read beef heart, beef liver, beef kidney, beef tripe, beef bones, etc.

So why do some products list the exact meat ingredients and others just say meat by-products?

Friskies dry

friskies purina cat food brand dry
  • Product name rule = flavor rule, no minimum requirement of meat
  • Carb amount = approx 47% dry matter basis
  • First 5 ingredients = Ground yellow corn, corn gluten meal, chicken by-product meal, soybean meal, beef tallow

There’s no actual meat in this product! And 3 out of 5 first ingredients are carbohydrates.

Not suitable for cats.

There’s also soy and powdered cellulose both of which are cheap fillers and can cause digestive upset.

Further down the list, you’ll see color additives yellow 5, yellow 6, and red 40.

These color additives can damage DNA cells and contribute to cancer.

Fancy Feast

fancy feast purina cat food brand
  • Product name rule = no rule, no minimum requirement of meat
  • Carb amount = approx 19% dry matter basis
  • First 5 ingredients = Fish broth, salmon, wheat gluten, liver, meat by-products

3 out of the first 5 ingredients are mystery meats.

What type of fish is used for the fish broth?

Where did the liver come from?

What type of meat by-products are in this food? Is it chicken? Pork? Beef? Turkey? Lamb?

Do you see what I mean?

We have absolutely no idea what type of meat is in this product.

And going back to the CRS Report for Congress, it could include dead animals from animal shelters.

Scary, I know. But we have no idea what it actually includes because the manufacturer doesn’t tell us.

Purina ONE

purina one wet cat food brand
  • Product name rule = recipe rule, 25% minimum requirement of meat
  • Carb amount = approx 11% dry matter basis
  • First 5 ingredients = Chicken, liver, broth, pork lungs, fish

Again we have some mystery ingredients.

Where did the liver and broth come from? What type of fish?

You’ll notice it says “premium” on the label.

Guess what?

Premium is a totally unregulated term in feed law… Premium pet food doesn’t have special requirements that differ from any other pet food.

AAFCO

All US pet food manufacturers have to follow AAFCO’s guidelines and definitions when creating and labeling their products.

So they know that the word “premium” doesn’t mean anything. So why would they bother using it on the label?

Purina ProPlan

purina proplan dry cat food
  • Product name rule = formula rule, 25% minimum requirement of meat and rice combined
  • Carb amount = approx 27% dry matter basis
  • First 5 ingredients = Lamb, rice, corn gluten meal, dried egg product, soy protein isolate

I’m sure you’re thinking, “but lamb is the first ingredient”.

Ingredients must be listed in predominance by weight.

When it’s added to the food.

The USDA states muscle meat is approximately 75% moisture.

Moisture is removed during the 3 cooking (extrusion) processes in which kibble is made.

So 75% of that lamb is gone by the time the kibble is done.

Carbohydrates, however, are already dried when they’re added to kibble.

So again most of what you’re buying is carbohydrates your cat isn’t designed to digest.

If cats cannot digest a lot of these ingredients, how can this be good for a sensitive stomach?

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JM Smucker cat food brands (Rachel Ray Nutrish, 9Lives, MeowMix, Natural Balance)

JM Smucker is another conglomerate that has its hands in pet food.

I’m sure you’re familiar with some of their brands like Dunkin Donuts, Crisco, and Jif.

Let’s take a look at their cat food…

Rachel Ray Nutrish

rachel ray nutrish kibble cat food
  • Product name rule = recipe rule, 25% minimum requirement of meat and potato combined
  • Carb amount = approx 39% dry matter basis
  • First 5 ingredients = Chicken, chicken meal, dried peas, pea flour, turkey meal

This product is marketed as grain-free.

But approximately 39% of the product comes from carbohydrates.

Grain-free does not mean carb-free.

Potatoes, peas, and pumpkin all contribute carbohydrates.

Not to mention, there are several class-action lawsuits against Rachel Ray pet food.

One of her dog foods actually contained dog DNA. Among a long list of other animals that were not listed in the ingredients.

9Lives wet

9lives wet cat food
  • Product name rule = no rule, no minimum requirement of meat
  • Carb amount = approx 18% dry matter basis
  • First 5 ingredients = Meat by-products, water, poultry by-products, chicken, fish

We have more mystery meats!

What type of meat? What type of by-products?

Which kind of poultry?

What type of fish?

9Lives dry

9lives cat food dry
  • Product name rule = with rule, 3% minimum requirement of meat
  • Carb amount = approx 47% dry matter basis
  • First 5 ingredients = Whole ground corn, chicken by-product meal, corn gluten meal, soybean meal, whole wheat

Almost 50% carbohydrates.

And 4/5 first 5 ingredients are carbohydrates.

MeowMix

meowmix cat food brand
  • Product name rule = with rule, 3% minimum requirement of meat
  • Carb amount = approx 27% dry matter basis
  • First 5 ingredients = Fish broth, chicken, fish, wheat gluten, ocean fish

The first 5 ingredients vary with each product in this variety pack.

But the first ingredient in all of them is…

Mystery meat!

Fish broth? What kind of fish?!

A few other questionable ingredients include sugar, guar gum, carrageenan, modified food starch, and the list goes on.

Carbs break down into sugar. And sugar fuels obesity and related diseases.

Colgate-Palmolive cat food brands (Hill’s Science Diet)

Colgate-Palmolive owns Hill’s Pet food.

Hill’s Pet is popular because it’s “vet-recommended” cat food.

In 2007, Colgate breached advertising laws in their claim “80% of dentists recommend Colgate”.

The advertising claim made it seem like Colgate was recommended 80% of the time over other brands.

But the survey actually asked dentists and hygienists to recommend several brands.

Additionally, the dentists and hygienists that participated in the survey were unaware that the survey was being conducted by Colgate.

So what does this have to do with cat food?

Well, Colgate-Palmolive uses the same clever marketing to sell Hill’s Science Diet cat food.

It says it right on the label: veterinarian recommended.

Some of Hill’s Pet foods are even prescription diets.

By the way, Hill’s Pet trademarked the term “prescription diet” as part of their logo.

And there are class action lawsuits against the company because the products don’t actually contain any prescription medicine.

Hill’s Prescription Diet

hills prescription diet kibble food bad for cats
  • Product name rule = flavor rule, no minimum requirement of meat
  • Carb amount = approx 31% dry matter basis
  • First 5 ingredients = Chicken by-product meal, brewer’s rice, corn gluten meal, powdered cellulose, dried tomato pumice

No actual meat in this food.

According to AAFCO’s cat food label rules, there’s no minimum requirement of chicken.

If there were at least 3% chicken in this product, the name would be “with chicken” instead of “chicken flavor”.

Additionally, AAFCO states that by-product meals are rendered meats.

This specific prescription is for weight management. But if cats store excess carbs as fat, how can this be good for weight management?

And you need a prescription for this product…

Hill’s Wet

hills diet cat food
  • Product name rule = entree rule, 25% minimum requirement of meat
  • Carb amount = approx 43% dry matter basis
  • First 5 ingredients = Water, chicken, turkey giblets, pork by-products, pork liver

We see more by-products.

By the way, some people love to tell me that by-products aren’t that bad. But again, I can buy pork by-products at the grocery store. We have no way of knowing what type of by-products are used in cat food and how clean they are.

This is for hairball control, but the rest of the ingredients aren’t good for digestion.

Powdered cellulose, corn starch, corn gluten meal, wheat flour, brewers dried yeast, etc.

How can this help hairball control if cats can’t digest most of these ingredients?

I hear you saying, “But these are vet-recommended brands”…

Well, these “prescription” diets are a scam.

General Mills cat food brands (Blue Buffalo, Blue Wilderness, Blue Basics, Blue Carnivora, Blue True Solutions, Blue Freedom, Blue Natural Veterinary Diet)

Hopefully, by now you’re seeing a trend.

We have major corporations that make junk food for humans. And they’re also making junk food for our cats.

General Mills, a cereal company, owns all Blue Buffalo products.

At this point, it should come as no surprise that a cereal manufacturing company also owns cat food companies.

Many of these products contain high amounts of cereals and grains.

Also, think about it like this…

All companies say that their cat food is the best. But why are there so many brands within the same company?

If it was truly the best, they wouldn’t need to create 7 different brands, right?

Blue Freedom

blue buffalo freedom grain free cat food
  • Product name rule = with rule, 3% minimum requirement of meat, peas, and potatoes combined
  • Carb amount = approx 41% dry matter basis
  • First 5 ingredients = Deboned chicken, chicken meal, tapioca starch, peas, pea protein

Free of grains and gluten.

But, again, grain-free does not mean carb-free.

Peas and potatoes have carbohydrates.

And peas and potatoes are listed on the product name in the same size font as the chicken.

So these ingredients are grouped in the product name rule.

And the minimum requirement is 3% of these ingredients combined. And that maximum doesn’t pass 24.9%.

Otherwise, it would say dinner, recipe, platter, entree, etc. in the product name.

Blue Basicsblue basics limited cat food

  • Product name rule = entree rule, 25% minimum requirement of meat and potatoes combined
  • Carb amount = approx 29% dry matter basis
  • First 5 ingredients = Turkey, turkey broth, turkey liver, potatoes, natural flavor

Here’s another grain-free cat food full of carbs.

It says limited ingredients…

But still contains questionable ingredients like carrageenan, cassia gum, guar gum, and mystery fish oil.

Blue Wilderness

blue wilderness dry cat food
  • Product name rule = with rule, 3% minimum requirement of meat
  • Carb amount = approx 40% dry matter basis
  • First 5 ingredients = Deboned chicken, chicken meal, tapioca starch, pea protein, peas

This one says high-protein and grain-free. The brand is called Wilderness.

It’s gotta be fit for carnivores, right?

Nope.

40% carbohydrates.

Powdered cellulose, a bunch of pea products, potato starch, flaxseed, dried yeast, and so on.

NOT part of a cat’s natural diet.

Final thoughts on worst cat food brands

Unfortunately, most commercial cat food brands are the worst. The same billion-dollar companies that produce junk food for humans also make very low-quality cat food.

It’s important to understand AAFCO guidelines so you know how to read cat food labels.

These huge companies use fancy claims and marketing gimmicks that don’t actually mean anything.

So what can you do about it? Learn how to read labels properly so you can find cat food that works best for your cat’s individual needs.

Check out my complete cat food label guide to find better quality cat food.