Best Cat Food for Smelly Poop

Your cat’s poop and gas probably don’t smell very pleasant, but if they start to reek, then there may be something wrong with your cat.

You shouldn’t expect them to smell particularly nice, however, foul smelling gas and cat poop are often signs that your cat is eating food that isn’t right for it or that it has some sort of health problem.

Quick Look At Our Top 3 Picks


Top Pick

Instinct Original Grain Free Recipe
  • Promotes a healthy lifestyle
  • Made from ethically raised meat sources
  • Price: ~$0.38/Oz
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Budget Pick

Natural Balance Limited Ingredient Dry Cat Food
  • Single protein meat source
  • Meticulously tested to be safe for your cat
  • Price: ~$3/Ib
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Best for Older Cats

Wellness CORE Natural Grain Free Turkey & Duck Pate Canned Cat Food
  • Contains chicory root as a prebiotic
  • Contains ground flaxseed for fiber
  • Price: ~$0.45/Oz
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There are lots of things that could be causing your cat to have stinky poop, including a high protein diet, according to The Nest.

That protein may be necessary for your cat, and your only option could be to switch out the kind of protein your cat consumes while adding probiotics for healthy digestion.

Eating spoiled food, having constipation, diarrhea or having a parasite inside its body could all be reasons why your cat’s poop doesn’t smell so good these days.

Also ReadBest Cat Food for Constipation

Many times, simply changing out what your cat is eating can be enough to fix the smelly poop problem, but it’s a good idea to talk to your vet to see if the problem is more severe than just a poor diet.

Your cat may have some food allergies as well. These are not as common as most people think, but they could be the cause of your cat’s flatulence and foul odors.

Food allergies for cats tend to be triggered by wheat, corn, soy, potatoes, seafood and beef.

Some cats are also intolerant of lactose (found in dairy products), but that’s not actually a food allergy. For more info, I recommend that you read our guide on the best cat food for sensitive stomach

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The Benefits of Buying Grain Free, Hypoallergenic Cat Food

Some vets are going to recommend that you switch your cat’s diet to something that is grain free and hypoallergenic in other words, specifically targeted to combat food allergies.

Here are the benefits you and your cat will enjoy by choosing this food over commercial cat food.

  • Cuts back on allergy risks– Even if your cat is not having allergy issues with the food it is eating, switching to a hypoallergenic cat food will reduce the risk that there will be allergy symptoms in the future
  • Provides a healthier and more balanced diet– Grain free, hypoallergenic food tends to be very healthy and packed with nutrients of all kinds
  • Helps poop smell better– If your cat is having smelly poop, then giving your cat a grain free meal can make a huge difference there
  • Improves food tolerance– Most hypoallergenic cat foods contain little to no dairy, which is a major source of food intolerance in cats
  • Makes cats feel better- Cats have more sensitive noses than we do, and if they don’t have to smell their stinky poop anymore, then they will be happier and feel better

What Is Causing Your Cat’s Poop to Smell

We touched on a few of the things that could be fouling your cat’s poop, but let’s get you a more detailed list of them so that you know what to watch out for:

  • Spoiled food- When your cat eats food that is expired, filled with bacteria or something straight from the garbage, then the cat’s poop is probably going to smell
  • Tapeworms and other parasites- Stomach parasites not only make your cat’s poop smell but also damage your cat’s body over time
  • Constipation– If there is some blockage in your cat’s colon, it can cause poop and gas to smell awful
  • Digestive disorders– According to, unabsorbed starch and other digestive problems can cause your cat’s poop to smell foul
  • Drugs– If your cat is taking some medications, those may be causing the problem, and if those drugs are causing hormonal changes, then that could be to blame for the smelly poop as well
  • Infections– Certain types of infections can cause a similar problem as well

Our Picks For Top Rated Cat Food For Sensitive Digestion

We picked out a few cat food products that should help you get your cat feeling great and smelling great again. We are going to start with the dry food options that we think are best, and then move onto the wet food ones.

Natural Balance Limited Ingredient Dry Cat Food Green Pea and Duck

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Natural Balance is known for testing all their cat food products very thoroughly. This limited ingredient dry cat food is no different, and it offers pet owners a way to treat their unhealthy cats with something nutritious and delicious. Most cats really go for this all-natural product that is packed with green pea and duck and a ton of nutrients.

The meat used is all from a single source in order to limit the risk of spoiled food and bacteria. It is also high-quality meat, no matter which flavor you go with. On top of all that, the formula has been specially designed to meet all your cat’s dietary needs. You might be concerned that limited ingredients mean limited nutrients, but this is often a much healthier choice for your cat than commercial brands that use artificial flavors and multiple protein sources.


  • Single protein meat source
  • Affordable pricing (when compared to other limited ingredient options)
  • Meticulously tested to be safe for your cat


  • Natural flavoring may not be to every cat’s liking

BLUE Basics Limited-Ingredient Grain Free Dry Cat Food

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Here is another example of a cat food manufacturer choosing a single animal protein source to great results. The turkey in this cat food is of the highest quality, plus there are a ton of nutrients and vitamins packed into the formula. This cat food is meant to reduce allergic reactions and cut down on food intolerance in cats, so if your cat is having any digestive issues, then this a great choice.

All the meat in BLUE’s cat food here is real meat, and not a bit of artificial flavoring or preservatives can be found. Your cat may take some time to acclimate to the new taste, but it should be agreeable to most cats. BLUE is charging a bit more for their dry cat food with limited ingredients than most of the competition is, but if your cat will eat it and stay healthy, then it could be worth the higher price tag to you.


  • Very healthy for your cat
  • Helps to eliminate odors
  • Contains complete nutrition that cats need


  • The cost is higher than many similar products
  • Some cats may take a while to like it

Now, we want to show you a few wet cat food options that can help your cat get rid of that awful smelling poop.

Natural Balance L.I.D. Limited Ingredient Diets Duck & Green Pea Formula Wet Cat Food

Natural Balance L.I.D. Limited Ingredient Diets Duck & Green Pea Formula Wet Cat Food

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The quality venison meat is the only meat source in this cat food, making it a very low risk product for cats who have food allergies. Even cats who don’t have any allergies can benefit from this, though, as it can provide them with full nutrition and a low risk of food intolerance. It’s also great food for cats who are having smelly poop or frequent flatulence, as it contains few ingredients that could trigger these kinds of indigestion symptoms.

Natural Balance has ensured that its cat food products are well tested, giving consumers peace of mind about the safety of the food. Even so, your cat may not take to it right away. The natural flavoring and wild meat taste of the venison can be a little too different for many cats, but if you give your cat some time, they should eat it after a while.


  • Packed with nutritional value
  • Free from artificial flavorings and other manmade additives
  • Contains a single meat source to reduce allergen risk


  • Some cats will have indigestion with this kind of food until they adjust to it

Instinct Original Grain Free Recipe Natural Wet Canned Cat Food by Nature’s Variety

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There is no major allergen-triggering ingredient in this cat food’s formula. You’ll find no soy, potatoes, corn and other foods that could give your cat indigestion. What you will find are farm raised animals that serve as a single protein meat source for the cat food. You’ll also find tons of nutrients like vitamins and minerals your cat needs for a healthy and balanced diet.

This is a high protein food, so you don’t have to worry about your cat getting everything it needs for a balanced diet and an active lifestyle. The nutrients in Instinct’s grain free cat food are also designed to help your cat grow out a beautiful, glossy fur coat and have excellent joint health. The gluten free and grain free formula is ideal for cats that have been suffering from food allergies, indigestion, smelly poop or food intolerance.


  • Made for cats with indigestion
  • Promotes a healthy lifestyle
  • Made from ethically raised meat sources


  • Some cats won’t be interested in it


ZiwiPeak Canned Cat Cuisine

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ZiwiPeak packs its cat food with not only ingredients that cats love but also stuff that’s really good for them. Most cats are going to gravitate toward this food quickly, but others will take their time in acclimating to it, due to the unique taste of the all-natural ingredients.

ZiwiPeak costs more than most other grain free, limited ingredient cat foods, so you’ll have to decide for yourself if it is worth that extra cost. What you are paying for is high quality food that is not made from anything that is known to cause an allergic reaction in cats. That means no corn, soy, gluten sugar, lactose and other items that can lead to indigestion or food intolerance. Your cat should love it, and your cat’s stomach will definitely appreciate what ZiwiPeak is offering.


  • Contains mostly meat
  • High quality ingredients
  • No gluten, corn, soy or another allergy-causing component


  • Cost is above Avg.

Wellness CORE Natural Grain Free Turkey & Duck Pate Canned Cat Food Review

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This food has the foundations of a good meal for your cat. It’s meat-based and moisture-rich to promote healthy bowel function. While it contains more plant matter than some other canned foods and might not be a great choice for everyday feeding, this food contains several additions that can benefit constipated cats.

It’s made with multiple high-fiber binders, along with ground flaxseed, another fiber-rich ingredient that can increase gut motility. It also includes chicory root extract, which is a prebiotic that encourages probiotic activity.


  • Contains chicory root as a prebiotic
  • Contains guar gum
  • Contains ground flaxseed for fiber
  • Primarily made from nourishing meat ingredients


  • Contains more plant ingredients than some other cat foods


If you notice that your cat’s poop smells extra bad, then you should start by contacting a veterinarian first, says cat health site

Your vet can help you determine what the cause of the smelly poop is and what you need to do to fix the problem.

If your cat only has this issue for a day or two, then it may not be something that you need to concern yourself with, but if it persists or it keeps coming back, then you will need to do something about it.

Often, a diet change is all your cat needs to start feeling better and to start having better smelling poop.

Cat poop will never smell pleasant, but it should not be markedly foul. If it is, then changing out the diet is often the key to making a huge difference with this particular problem.

Be sure to consult with your veterinarian about any major changes you are making to your cat’s lifestyle and diet, especially if your cat is being treated for a medical condition.

We hope that you can use the information here to get your cat healthy once more and to get rid of that foul poop smell.