Is the cat an omnivore or a carnivore? This is one of the most frequently asked questions among those who live with cats and want to provide them with the best possible diet. Although at first glance it may seem like a simple discussion, the answer is more complex than it appears and involves analyzing the evolution, anatomy, metabolism, digestive system, and nutritional needs of the domestic cat. If you want to fully understand the specific nutritional characteristics of felines, here you will find a detailed and up-to-date guide, integrating the latest and most proven knowledge.
Why does doubt arise about a cat's diet?
The debate over whether cats are omnivores or carnivores has grown in recent years, due both to the rise of alternative diets and the increase in information on animal nutrition. Many commercial foods include plant-based ingredients, leading some to believe that cats can be omnivores. However, Feline physiology and behavior demonstrate a clear preference and need for meatUnderstanding why this is so is essential to choosing the right diet for our feline companions.
Digestive system of humans and cats: a comparison
To understand the feeding nature of cats, it is helpful to compare their digestive system with that of humans, who are omnivores.
The humans They can efficiently ingest and digest both animal and plant products. Their digestive system begins digestion in the mouth thanks to the action of saliva and mastication. The food bolus passes to the stomach where gastric juices further break down the nutrients. The small intestine, about 8 meters in length, allows for prolonged nutrient absorption. Finally, the large intestine absorbs water and vitamins before eliminating waste. Human digestion is relatively slow, lasting between 2 and 4 hours or even more depending on the food.
The cat's digestive system, however, is adapted very differently. Their gastric juices are much more potent And their stomachs tend to have a particularly acidic pH, ideal for digesting raw meat, offal, and bones, and even eliminating bacteria and parasites present in fresh or decomposing prey. Intestinal transit is faster, and the cat's small intestine is considerably shorter proportionally (about 4-5 times the animal's length), which demonstrates its inefficiency in digesting large amounts of fiber or complex carbohydrates present in plants.
Anatomical and sensory features that reveal the carnivorous cat
The cat's teeth They are pointed and sharp, designed to tear flesh and crush bones in small prey. The jaw only moves up and down, unlike omnivores like humans, who can make lateral movements to crush vegetables; in cats, this movement is absent.
In addition, cats have a rough tongue (covered in hook-like papillae) that allows them to tear flesh from bones and clean their fur. Their retractable claws, superior night vision, and developed hearing make them highly effective predatorsAll of these adaptations reflect a predatory biology specialized in hunting and consuming meat.
As for the sensory preferencesCats have fewer taste buds than dogs and don't respond to sweet tastes, as they lack the receptors associated with sugar. However, they respond intensely to salty, sour, and bitter flavors, especially the amino acids found in meat. Furthermore, they prefer food at a temperature similar to that of freshly hunted prey, between 38°C and 40°C.
Feline metabolism and essential nutritional needs
The cat's metabolism is adapted to obtain energy and maintain their vital functions from animal proteins and fatsAlthough they can consume plant foods, their need for essential nutrients can only be met through animal sources.
- Essential amino acidsCats require arginine and taurine, which are found exclusively in animal tissues. Taurine is critical for vision, heart function, and reproduction. Taurine deficiency can lead to blindness and fatal heart problems.
- Essential fatty acidsArachidonic acid is only found in animal fat and is essential for feline health.
- Preformed vitaminsCats do not convert beta-carotene into active vitamin A, so they require vitamin A directly from animal meat or liver.
- Vitamin D: They do not synthesize enough vitamin D from sunlight, so they also obtain it from meat.
- Niacin (vitamin B3): Their metabolism depends on a constant intake, since they cannot synthesize enough from tryptophan.
These specific needs make the cat be classified as strict carnivoreAlthough it can digest minimal amounts of vegetables, it could never survive on a diet based solely on vegetables or grains.
Feeding behavior and evolutionary heritage of the domestic cat
The modern domestic cat (Felis silvestris catus) evolved from the African wild cat, a solitary and primarily nocturnal predator. In its natural environment, hunts several small prey a day (rodents, birds, reptiles, and even insects), eating fresh foods rich in water, protein, fat, and minerals. This eating pattern has influenced their metabolism and current behavior.
La flexibility in eating habits The domestic cat's distinctiveness is notable: although it depends on humans for its food supply, it largely retains its wild instincts. This manifests itself in hunting games, a preference for small portions spread over several meals, and a strong territorial sense (distinguishing between sleeping, feeding, and elimination areas).
- Hunting instinct: Playing at stalking, jumping and capturing prey or toys is a constant.
- Night activity: Take advantage of the night to be more active and explore or hunt, just as you would in the wild.
- Feeding according to need: Prefers to eat small portions throughout the day.
- Privacy Search and Defense Against Predators: Chooses protected places to relieve themselves and hide signs of weakness.
The domestic cat's eating behavior adapts to its experiences, its environment, and the available food options, but the biological and evolutionary basis remains the same.
The myth of the omnivorous cat and the role of commercial foods
The belief that the cat can be omnivorous has arisen in part because the Commercial feeds and foods often include plant ingredients. Although cats can digest certain carbohydrates in small amounts, their bodies have not fully developed the enzymes needed to process large volumes of starch or fiber. In addition, Excess grains or vegetable by-products can result in obesity, diabetes, digestive problems and nutritional deficiencies.
However, a moderate amount of vegetables or grains in feed can provide fiber, facilitate intestinal transit, and help prevent hairballs, but they should always be accompanied by a high content of animal protein of proven quality. The main ingredient in a cat's diet should always be meat., whether in the form of muscle, viscera, fish or dry/wet feed rich in animal protein.
Types of carnivores and what it means to be a strict carnivore
In animal ecology and nutrition, several types of carnivores are distinguished, and it is essential to know the classification of cats:
- Facultative carnivores: Like the dog, which although it prefers meat, can survive (though not thrive optimally) on mixed diets of plant and animal origin.
- Strict carnivores: Like the cat, which is absolutely dependent on nutrients exclusively from meat and cannot meet its vital needs with a vegetarian or vegan diet.
In the case of cats, a lack of animal protein and trying to keep them on exclusively plant-based foods leads, sooner or later, to serious metabolic problems, deficiencies, and potentially fatal diseases.
Can cats eat plant foods?
Although the Cat may occasionally ingest grass or small amounts of vegetables (which help purge the digestive system or provide some fiber), these ingredients are not an essential part of their diet. In nature, the only significant plant source usually comes from the digestive contents of herbivorous prey, which the cat consumes by ingesting it completely. This source is already partially digested and adapted to its assimilation capacity.
It is important to emphasize that Carbohydrates are not essential in a cat's diet.In fact, an excess can lead to metabolic problems such as obesity or diabetes mellitus, which are very common in sedentary cats fed low-quality, grain-rich feed.
What should a cat's ideal diet contain?
For a cat to enjoy optimal health and grow properly, its diet should be based on the following principles:
- Proteins of high biological value: They come from meat, fish, organ meats, and boiled eggs. They should be the staple food and main source of energy.
- Animal fats: They provide energy and essential fatty acids, essential for healthy skin, coat, brain function, and internal organs.
- Essential vitamins and minerals: Such as taurine, preformed vitamin A, vitamin D, arachidonic acid and arginine.
- Humidity: Cats, by evolution, obtain most of the water they need from their prey. Therefore, it is advisable to supplement dry food with wet or fresh food to avoid kidney problems, which are very common in cats fed exclusively dry food.
- Moderate fiber: It may be present in small amounts from vegetables to improve intestinal transit and prevent hairballs, especially in long-haired cats.
In quality commercial foods, the labeling must reflect that the animal protein is in first place in the composition, avoiding feeds in which vegetable by-products or cereals predominate.
Commercial food vs. natural or homemade food
The current market offers Wet and dry food designed specifically for cats, rich in high-quality animal protein and formulated according to life stage, weight, activity level, and specific condition (kittens, adults, seniors, neutered, etc.). It's advisable to choose products with a high meat content and without excessive additives or grains.
On the other hand, there are alternatives such as BARF diet (Biologically Appropriate Raw Food), cooked natural foods, or mixed diets, which seek to emulate the feline's evolutionary diet. These options can provide additional benefits such as increased moisture, improved digestibility, and reduced ultra-processed foods, but require planning and veterinary supervision to avoid nutritional deficiencies.
However, A vegetarian or vegan diet should never be offered to a cat, since their organism cannot survive without exclusively animal nutrients.
What happens if the cat does not receive an adequate diet?
A poor diet, low in animal protein or based on plant-based ingredients, can cause the following in cats:
- Taurine deficiency: It causes blindness and serious heart problems (dilated cardiomyopathy).
- Kidney and urinary problems: A diet low in moisture and high in inadequate minerals increases the risk of kidney failure and urinary stones.
- Obesity and diabetes: Excess carbohydrates and a sedentary lifestyle lead to weight gain and glucose intolerance.
- Dull hair and dry skin: Essential fatty acid deficiency affects coat health and immune function.
- Developmental delay and poor growth: In kittens and young cats, an incomplete diet can affect their bone, muscle and neurological development.
Therefore, Caring for the cat's carnivorous nature is vital to its well-being and longevity..
Can a cat have different food preferences?
Within the feline species there are Large individual variations in preference for textures, flavors, temperatures, and food presentationThis is influenced by previous experiences, environment, ingredient quality, and genetics. Some cats may reject certain flavors or textures, while others may gradually accept new foods. It's important to introduce dietary changes gradually to avoid rejection or digestive problems.
Furthermore, it is essential to respect their natural behavior by allowing them to regulate the amount of food they consume, as long as there are no health problems that require strict weight control.
What types of protein and fat are suitable for cats?
Not all animal proteins are created equal. The best options for cats are those of animal origin and high bioavailability., such as:
- Lean meat (chicken, turkey, beef, rabbit, lamb).
- Fish (salmon, sardine, tuna; offered in moderate quantities due to their mineral and fatty acid content).
- Viscera (liver, kidney, heart: unparalleled source of micronutrients, always in the right proportion).
- Boiled eggs (never raw, to avoid bacterial risks and blockages in biotin absorption).
Suitable fats They are mainly of animal origin (chicken, duck, pork, fish), while vegetable oils do not perform the same function and may not provide the essential fatty acids required.
What is the best way to feed a cat?
Each stage of feline life has different needs:
- Kittens: They require diets high in protein and calories to support their rapid growth.
- Adult cats: Your diet should be balanced, adapted to your activity level and physical condition.
- Sterilized cats: They need foods with less fat and calories to avoid being overweight.
- Older cats: It's a good idea to choose foods that are easy to digest and contain nutrients that help maintain muscle mass and kidney function.
The current commercial offering includes specific feed and wet foods for each stage and particularity of the cat's life.
By maintaining a diet tailored to your cat's carnivorous nature, you minimize the risk of common ailments and contribute to a long and full life.
