
Cats are obligate carnivores, meaning they require a high-protein diet. However, this can lead to stinky poop, as protein fermentation is one of the worst-smelling bacterial fermentations. Additionally, abrupt dietary changes can disrupt a cat's digestive system, resulting in pungent poop. To combat this, cat owners can prioritise simplicity and efficiency in their cat's diet, opting for food that minimises the amount of work the cat's body needs to do to process it. Wet food, for example, can help keep odours down due to better hydration. Fibre is also important, as it helps with digestion and can reduce odours. Probiotics are also beneficial, as they promote a healthy colony of bacteria in a cat's intestines, leading to better digestion and less pungent poop.
| Characteristics | Values |
|---|---|
| Fiber | The right amount of fiber helps with digestion and can reduce odors |
| Probiotics | Promote a healthy colony of bacteria in the intestines, leading to better digestion and less pungent poop |
| Limited ingredients | Reduce the chances of a reaction, and help with odor control |
| Prebiotic fibers | Oats and pumpkin nurture the cat's microbiome, fostering daily well-being |
| Omega-3 fatty acids | Help protect the cat's coat and skin |
| Antioxidants | Support healthy skin and coat |
| Single protein source | A novel protein is one the cat hasn't eaten before, reducing the chances of digestive issues |
| Hydration | Dehydration can lead to more concentrated feces, resulting in a stronger smell |
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What You'll Learn
- Wet food helps keep odours down due to better hydration
- Raw food mimics a cat's natural diet, potentially leading to less smelly waste
- High-protein foods can cause stronger-smelling cat waste
- Fibre helps with digestion and can reduce odours
- Probiotics promote a healthy colony of bacteria in a cat's intestines, leading to better digestion and less pungent poop

Wet food helps keep odours down due to better hydration
Cats can be fussy eaters, but it's important to ensure they get the right nutrition and hydration. Cats are obligate carnivores, so they need a high-protein diet, but this can contribute to more malodorous stools.
Wet food is a great way to ensure your cat stays hydrated. Cats on a wet food diet might experience less stinky litter boxes. Wet food has a higher moisture content than dry food, which can lead to less dry and more compact poops.
A hydrated cat will have healthier digestion, and therefore less pungent poop. Dehydration can lead to harder, more concentrated faeces, which will smell worse. Wet food can also help prevent urinary tract issues, which are common in cats due to their desert origins.
It's important to note that switching up your cat's food should be done slowly and with guidance from your vet, especially if your cat has specific health concerns.
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Raw food mimics a cat's natural diet, potentially leading to less smelly waste
Cats are obligate carnivores, meaning they require a high-protein diet. While this can contribute to more malodorous stools, a raw food diet can help to address this issue. Raw food mimics a cat's natural diet, potentially leading to less smelly waste.
A raw food diet can provide several benefits for cats, including improved digestion and nutrient absorption. Cats' bodies are designed to digest and metabolize raw meat efficiently, as it contains the necessary enzymes for full and complete digestion. By feeding them a diet that matches their biology, we can promote overall health and reduce digestive issues such as excessive hairballs, vomiting, diarrhoea, and constipation.
Raw diets typically include raw meat, organs, and bones, providing a biologically appropriate and satisfying meal for cats. This type of diet is more digestible, resulting in smaller, less frequent, and less smelly stools. The high moisture content in raw food also helps keep cats hydrated, which is crucial as cats naturally derive most of their water from their diet.
However, it is important to note that preparing raw ingredients at home may introduce safety risks, such as foodborne pathogens and nutrient deficiencies. Commercially prepared raw cat food, on the other hand, is formulated by animal nutritionists and reviewed by veterinarians to ensure complete and balanced nutrition. It is always recommended to consult with your veterinarian before making significant changes to your cat's diet, especially if your cat has specific health concerns.
In addition to a raw food diet, other factors can influence the odour of cat waste. Ensuring adequate fibre intake and including probiotics can promote better digestion and reduce odours. Hypoallergenic foods with limited ingredients may also help control odours by reducing the chances of adverse reactions.
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High-protein foods can cause stronger-smelling cat waste
Cats are obligate carnivores and require a high-protein diet. However, too much protein can lead to stinky cat poop, as it may not all be fully digested. Undigested protein in a cat's system can lead to gastrointestinal distress and stronger-smelling waste.
Protein fermentation is one of the worst-smelling bacterial fermentations, and some cats are more sensitive to certain proteins. For example, lectins, which are plant proteins, can cause gastrointestinal distress when consumed in large quantities. Meat or meat meal should be listed first in a cat's food ingredients, but animal-based protein should be balanced with other nutrients.
A cat's diet should be curated to their individual needs, as each cat's digestive system may react differently to the same diet. It is important to ensure your cat gets the right amount of fibre, which helps with digestion and can reduce odours. Prebiotic fibres from oats and pumpkin, for example, can nurture your cat's microbiome.
Probiotics are also beneficial, as they promote a healthy colony of bacteria in a cat's intestines, leading to better digestion and less pungent poop. A supplement called yucca extract can also help, as it reduces bad smells by breaking down the odour-causing proteins in waste.
Wet cat food is often easier for cats to digest, leading to less smelly poop. It also helps keep cats hydrated, which is important for their overall health and can reduce litter box odours.
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Fibre helps with digestion and can reduce odours
Fibre is an essential component of a cat's diet. It helps regulate the motility in the GI tract and manages water balance, thus preventing constipation and diarrhoea. Fibre also helps to reduce weight in obese cats, as it makes them feel fuller for longer.
Fibre is also crucial for maintaining a healthy gut microbiome. The gut microbiome refers to the millions of microbes (bacteria, protozoa, fungi, viruses) that live inside a cat's digestive system. Fibre is broken down by bacteria in the colon, which then produce beneficial compounds like vitamins. This process is called fermentation. Both soluble and insoluble fibres can be broken down by bacteria in the gut, which then produce new compounds that nourish the cells of the colon. Soluble fibres tend to dissolve in gastric juices and water in the gut, and some turn into gels that can hold water, making stools easier to pass. Insoluble fibres add bulk to food, helping to regulate the transit of food through the intestines and improving stool consistency.
Fibre is also essential for cats with certain gastrointestinal conditions. For example, diabetic cats prone to weight gain may benefit from high-fibre food, as it may help manage their diabetes. Fibre can also help cats with gastrointestinal diseases that affect the large intestine.
When it comes to reducing odours, fibre can be beneficial. The main dietary reason for foul-smelling faeces is the amount of fibre and the overall digestibility of the food. Fibre helps with digestion, and better digestion can lead to less pungent poop. Wet food, for example, can help keep odours down due to better hydration. Hill's Science Diet Perfect Digestion, which contains prebiotic fibres from oats and pumpkin, is a cat food that aims to reduce stinky poop while also providing well-balanced nutrition.
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Probiotics promote a healthy colony of bacteria in a cat's intestines, leading to better digestion and less pungent poop
A cat's diet can have a significant impact on the smell of their poop. While it's natural for cat poop to have some odour, a particularly pungent smell may indicate that your cat is experiencing digestive issues.
In addition to probiotics, ensuring your cat is getting adequate fibre in their diet can also help with digestion and reduce odours. Fibre helps to bulk up stools and makes them easier to pass, which can lead to less smelly poop. Some cat foods, such as Hill's Science Diet Perfect Digestion, contain prebiotic fibres from oats and pumpkin, which can help nurture your cat's microbiome and improve digestion.
Protein quality and digestibility can also contribute to the smelliness of cat poop. As obligate carnivores, cats require a high-protein diet, but certain proteins or too much protein can lead to malodorous stools. It's important to choose high-quality protein sources, such as deboned chicken or chicken meal, and to be mindful of your cat's individual needs and reactions.
Some cat food brands, such as Smalls Human-Grade Fresh Food, offer high-quality, nutrient-dense foods that can help reduce the smell of cat poop. These foods are made with novel proteins and are designed to be easily digestible, leading to fewer odours.
It's important to remember that every cat is unique, and their digestive systems may react differently to the same diet. Working with a veterinarian or a board-certified veterinary nutritionist can help you determine the best diet for your cat's specific needs and ensure their long-term health and wellbeing.
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Frequently asked questions
The main dietary reasons for bad-smelling cat feces are the amount of fiber, overall digestibility, and the amount/digestibility of protein. As cats are obligate carnivores, they require a high-protein diet, which can make their stools smellier.
A cat's diet should be rich in species-appropriate animal protein. Some good options include:
- Blue Buffalo Wilderness, which includes high levels of omega-3 and omega-6 fatty acids.
- Taste of the Wild, which is grain-free and gentle on the stomach.
- Smalls Human-Grade Fresh Food, which is made with novel proteins.
- Purina ONE Tender Selects Blend Dry Cat Food, which is a cheaper option that still includes chicken as the first ingredient.
- Vital Essentials, which features rabbit as its only protein source.
Yes, it's important to ensure your cat is getting enough fiber, which helps with digestion and can reduce odors. Probiotics are also beneficial as they promote a healthy colony of bacteria in your cat's intestines, leading to better digestion and less pungent poop.
If your cat's diet hasn't changed recently, there may be an underlying health problem. Bacterial infections from E. coli and Salmonella can cause inflammation, leading to diarrhea and gas, which can have an unusually intense odor. Consult your veterinarian to determine the cause and what to do about it.











































