Cats are obligate carnivores, meaning their anatomy and physiology are designed to get the nutrients they need from animal tissues, not from plants. They have shorter intestines than omnivores like dogs, as well as sharper molars, and their pancreas makes less amylase, an enzyme that breaks down dietary starches found only in plants.
Cats have very specific nutritional needs, including protein requirements and amino acids such as taurine and arachidonic acid, which are found in animal-based proteins. While some commercial vegan cat foods are available, they rarely meet all of a cat's nutritional needs. Cats who eat poorly formulated vegan cat foods are at risk for health problems including protein deficiency, taurine deficiency, arachidonic acid deficiency, vitamin A deficiency, and vitamin B deficiencies.
However, one recent study has suggested that a vegan diet is not only safe for cats but may have health benefits. The study surveyed 1,369 cat owners, about 9% of whom reported feeding their cat a vegan diet, and found that owners of cats fed vegan diets reported fewer visits to the vet, less medication use, and said that their vet would be more likely to describe their cat as healthy. But the British Veterinary Association has warned against placing pets on alternative diets and said it was reviewing its advice.
What You'll Learn
- Cats are obligate carnivores, meaning they are designed to get nutrients from animal tissues, not plants
- Cats need taurine, which is only found naturally in meat
- Cats have a shorter intestinal tract than dogs, meaning they are not built to eat plants
- Cats produce less amylase than dogs, which is the enzyme that breaks down dietary starches found in plants
- Cats need more protein than dogs
Cats are obligate carnivores, meaning they are designed to get nutrients from animal tissues, not plants
Cats require a diet high in protein, and adult cats need to eat twice as much protein compared to dogs. They also need certain amino acids that are found in meat, such as taurine, which is crucial for cats as they cannot produce it themselves. While taurine can be chemically synthesized, its bioavailability in vegan cat food is questionable. Meat and seafood are also the best sources of arachidonic acid, another essential nutrient for cats.
Carbohydrates are not essential to a cat's diet, and vets recommend keeping their carb intake below 3%. Cats tend to burn proteins and fats for energy, and their digestive glands can only process carbs to a limited extent. Cats also need a small amount of fat in their diet for metabolism and energy processing.
Vitamins and minerals are also crucial in a cat's diet, and they can get the necessary vitamins and minerals from meat. A cat's natural diet in the wild provides the right amount of moisture (from blood) and fibre (from tendons, soft bones, and ligaments) to facilitate problem-free digestion.
Vegan cat food often contains plant proteins, such as legumes, vegetables, and grains, which are hard for cats to digest and may lead to gastrointestinal issues. It also tends to be high in carbohydrates, which can cause insulin resistance in cats, especially seniors. In addition, some brands may use cheap fillers like weeds, straw, corncobs, and peanut hulls that can hurt the feline digestive system.
Overall, while there may be some benefits to a vegan diet for cats, it is important to remember that cats are designed to get their nutrients from animal tissues, not plants. As such, it is crucial to consult a veterinarian before making any changes to a cat's diet.
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Cats need taurine, which is only found naturally in meat
Cats are obligate carnivores, meaning their anatomy and physiology are designed to get the nutrients they need from animal tissues, not from plants. One of these crucial nutrients is taurine, which is only found naturally in meat.
Taurine is an amino acid that is essential for cats. Cats cannot produce taurine themselves and must obtain it from their diet. Meat and seafood are rich sources of taurine, while vegan sources are hard to come by. Marine algae contain some taurine, but at about one-tenth the concentration available in meat and seafood.
Taurine deficiency in cats can have serious health consequences. It can lead to hypertrophic cardiomyopathy, a type of heart disease, and poor eyesight due to retinal degeneration. If a cat does not get enough taurine for an extended period, the consequences can be irreversible, including blindness and an enlarged heart that can be fatal.
Some vegan cat food products contain chemically synthesized taurine to meet the minimum nutritional requirements. However, the bioavailability of this synthetic taurine is questionable, and it may not be as easily absorbed or utilized by the cat's body as naturally occurring taurine from meat sources.
Additionally, it is important to note that cats fed a vegan diet may be at risk of other nutrient deficiencies, including protein deficiency, arachidonic acid deficiency, and deficiencies in vitamins A, B1, B3, and B12, all of which can have negative impacts on a cat's health.
While some studies have suggested that cats on vegan diets may experience health benefits, these findings are not conclusive, and more research is needed to determine the long-term effects of a vegan diet on cats. In the meantime, it is essential to consult with a veterinarian and ensure proper nutrient supplementation if one chooses to feed their cat a vegan diet.
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Cats have a shorter intestinal tract than dogs, meaning they are not built to eat plants
Cats are obligate carnivores, meaning they are designed to get the nutrients they need from animal tissues, not from plants. Their intestines are significantly shorter than a dog's, even taking their different body sizes into account. A cat's intestine-to-body-length ratio is only 4:1, in comparison to the canine ratio, which is 6:1. Cats have shorter intestines because the animal-based foods they're designed to eat don't contain fiber, so they're easy and quick to digest. Dogs, on the other hand, benefit from a longer intestinal tract that can extract nutrients from plant-based foods. Dogs also have relatively flat molars (teeth at the back of their mouth) that can grind up fibrous food. Cat molars are sharp and made for shearing off pieces of meat.
Cats have a higher need for protein and certain amino acids than dogs. Adult cats need to eat twice as much protein compared to dogs. The Association of American Feed Control Officials' (AAFCO) adult maintenance minimum for cats for crude protein on a dry matter basis (meaning the percentage of nutrients in a pet food when all of its moisture has been removed) is 26%. For dogs, it's only 18%. While it may be possible to meet a cat's need for protein with a vegetarian diet (particularly if it contains eggs and dairy products), doing so in a healthy manner with a strictly vegan cat food is difficult.
Cats also need an ample supply of taurine in their diet. Dogs can convert other, more commonly available amino acids into taurine. Cats can't, so they require an ample supply of taurine in their diet. The AAFCO doesn't even set a minimum level for taurine in dog foods, but they have for cat foods. Meat and seafood are foods high in taurine, while vegan sources of taurine are hard to come by. Marine algae contain some taurine, but at about one-tenth the concentration available in meat and seafood.
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Cats produce less amylase than dogs, which is the enzyme that breaks down dietary starches found in plants
Cats are obligate carnivores, meaning their anatomy and physiology are designed to get the nutrients they need from animal tissues, not from plants. Their digestive system is built to process animal-based foods, which don't contain fibre, so they have shorter intestines than omnivores like dogs. Cats can handle some starch in their diets, but their bodies produce less amylase, the enzyme that breaks down dietary starches found in plants, than dogs. As a result, too much starch can lead to diarrhoea.
The feline intestinal tract is significantly shorter than a dog’s, even taking their different body sizes into account. A cat’s intestine-to-body-length ratio is only 4:1, in comparison to the canine ratio, which is 6:1. Cats have shorter intestines because the animal-based foods they’re designed to eat don’t contain fibre, so they’re easy and quick to digest. Dogs, on the other hand, benefit from a longer intestinal tract that can extract nutrients from plant-based foods.
Dogs also have relatively flat molars that can grind up fibrous food. Cat molars are sharp and made for shearing off pieces of meat. Additionally, a cat’s pancreas makes less amylase compared to a dog’s. Cats can handle some starch in their diets, but too much can lead to diarrhoea.
While it may be possible to supplement a vegan cat diet with the nutrients they need, it is difficult to ensure they are getting the right amount. Cats need twice as much protein as dogs and certain amino acids that are more readily available in meat.
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Cats need more protein than dogs
Cats are obligate carnivores, meaning they need nutrients that are available from animal tissues—not from plants. Their anatomy and physiology are designed to get the nutrients they need from animal tissues, not from plants. Cats have shorter intestines because the animal-based foods they eat don't contain fibre, so they're easy and quick to digest.
Cats need to eat twice as much protein compared to dogs. The Association of American Feed Control Officials' (AAFCO) adult maintenance minimum crude protein on a dry matter basis is 26% for cats and only 18% for dogs. While it may be possible to meet a cat's need for protein with a vegetarian diet (particularly if it contains eggs and dairy products), doing so in a healthy manner with a strictly vegan cat food is difficult.
Cats cannot synthesise taurine and arginine themselves. Since taurine is only found in whole meats and organs, plant-based proteins are nutritionally inadequate for cats. Taurine deficiency can cause irreversible blindness due to damaged retinal nerves and an enlarged heart, which can be fatal.
Cats also need a small amount of fat in their diet for metabolism and energy processing. They can get the necessary vitamins and minerals from meat.
The bottom line is that cats don't need a vegetarian diet but an ethical one. If we are sincere about feline welfare, we must respect their instincts and needs by giving them appropriate food.
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Frequently asked questions
Cats are obligate carnivores, meaning they need nutrients that are available from animal tissues and not from plants. Their digestive systems are designed to get nutrients from animal tissues, which are easy and quick to digest. A vegan diet may lead to malnutrition, taurine deficiency, stomach sensitivity, diabetes, disruption of pH levels, and other health issues.
Cats who eat poorly formulated vegan food are at risk for health problems, including protein deficiency, taurine deficiency, arachidonic acid deficiency, vitamin A deficiency, vitamin B1 deficiency, vitamin B3 deficiency, and vitamin B12 deficiency.
Symptoms of taurine deficiency include irreversible blindness due to damaged retinal nerves, enlarged heart, and immune system disorders.
Cats require a diet high in protein and certain amino acids. While it may be possible to meet a cat's protein needs with a vegetarian diet that includes eggs and dairy, a strictly vegan diet is difficult to balance. Commercially available vegan cat foods rarely meet all of a cat's nutritional needs. It is important to consult a veterinarian before changing a cat's diet.