Is Sugar Harmful for Cats? Find Out What You Need to Know

Is Sugar Harmful for Cats

Sugar is commonly found in human foods, but is it ok for cats? As obligate carnivores, cats are meant to process protein and fat material, not carbohydrates such as sugar.

She added that sugar is not toxic but that it causes her children health problems because their digestive system has a hard time processing it.

Annoyingly sweet sugar can fool you into excess calorie intake. A high-sugar diet can lead to obesity, type 2 diabetes and digestive problems.

In This Article


    Is Sugar Harmful for Cats? The Answer

    Sugar is not toxic for cats, but it’s not recommended in their diet. As obligate carnivores, cats are meant to process proteins and fats, not carbohydrates like sugar. While small amounts may not harm them, excessive sugar can lead to obesity, diabetes, and digestive issues.

    Regular consumption of sugary foods can upset their digestion, resulting in vomiting, diarrhoea, and other discomforts. It’s best to keep sugary treats and processed foods away from your cat and focus on feeding them high-quality food that aligns with their natural diet.

    Is sugar bad for cats?

    Cats don’t need sugar in their diet. As obligate carnivores, their systems are set up to use protein and fat as fuel, not sugars, which is what carbohydrates are when broken down in the body. Because cats aren’t very drawn to sweets, sugar can upset their digestion.

    Their metabolism is designed for a meat-eating diet, and they’re not equipped to process carbs well, making it hard to digest sugar. Keep feeding them sugar over time.

    You can have some health problems like obesity, diabetes mellitus and other forms of gastrointestinal disturbances such as flatulence, vomiting, diarrhea, and indigestion.

    Feeding sugary treats can contribute to a calorie overload in indoor cats, resulting in an overweight pet, which is the case with many cats raised indoors. Unlike us, cats do not require carbohydrates for energy;  they depend on animal protein.

    As a result, if they eat too much sugar and it enters their system, it can overwork the system, and the body can become more prone to things like metabolism deficiency and insulin resistance, which is connected to type II diabetes.

    In addition, some pure breeds, such as Sphynx cats, Ragdoll cats, and Maine Coon cats, are genetically prone to digestive complaints, which is why it is essential to steer clear of sugary foods.

    What sweets can cats not eat?

    One time, when my cat drank some milk, she developed flatulence and vomiting and became diarrhetic in no time. The cat, meanwhile, became diarrhetic. That’s when I learned how toxic certain sugary or dairy products can be for cats.

    Because cats are carnivores, their digestive system is inefficient at breaking down lactose, which can cause intolerance and gastrointestinal problems.

    Many sweets or high-carb foods are poisonous to cats. Citrus fruits (such as oranges) have citric acid and essential oils in the flesh and rinds that can cause irritation dermatitis in sensitive dogs and upset stomachs.

    Grapes are also hazardous — they have sucrose, fructose, glucose, and sometimes fungal toxins and tartaric acid, which may result in toxicosis.

    Likewise, high sugar content alcohol or beverage chocolate liquor can lead to ethanol poisoning, dizziness, muscular shaking, seizures and even a coma. These days, people will even offer vegan milk or soya milk, but again, it is too sweet for a carnivorous cat and is best avoided.

    Is there an association between dietary sugar and diabetes mellitus?

    Feline diabetes is on the rise, with some experts putting the incidence of the disease in cats at one in 50 to one in 400. Diabetes mellitus is a multifactorial disease with several risk factors, including age, obesity, the male gender, and neutering. Lack of physical activity and staying indoors may also be a factor.

    Moreover, some breeds, such as Burmese cats, have a genetic likelihood of getting this disease. Most cats with type-two, non-insulin-dependent diabetes mellitus have insulin resistance, with  reduced insulin sensitivity and, consequently, the damage of pancreatic islet beta cells.

    Food, sugar and high carbohydrate diets and their relation to the growth of diabetes are a concern for many. Carbohydrates, such as those found in glucose, can elevate blood sugar and, when consumed over time, cause hyperglycemia.

    Studies have shown that a high-carbohydrate diet, particularly one with lots of sugar, can exacerbate insulin sensitivity and insulin secretion issues.

    But really, it’s not just the sugar content — it’s everything else in the food. For instance, dietary protein and fat feeding may regulate glucose and insulin levels in some diabetic cats.

    Can cats digest sugar?

    Sugar isn’t necessarily toxic to cats, but their systems aren’t designed to accommodate it. Cats are obligate carnivores; their bodies were made to eat meat, not plant matter. In the wild, cats may consume trim levels of carbs from plant material in the stomachs of their prey and by gnawing on fibres like grass (which is why so many of them enjoy cat grass).

    However, modern sweeteners and table sugar aren’t natural to them, and cats don’t digest sugar that effectively. Their digestive systems don’t break down sugar well, so they can end up vomiting, having diarrhoea, and generally being uncomfortable. These symptoms can be mild or severe, depending on how sensitive your cat is and how much sugar they ate.

    Eventually, everyday sugar intake products can lead to chronic health problems for cats, such as obesity, diabetes and tooth issues. You should be mindful of the sugar in your cat’s intake, which can cause digestion problems. Although not lethal in small doses, sugar is still best kept out of their diet.

    What kind of sweets are poisonous to cats?

    Sugar is not toxic to cats; many ingredients are in sweets or candy. For instance, xylitol, common in sugar-free gums, mints, and some drinks, can also cause serious health problems in cats. It causes stomach upset, liver damage, and low blood sugar and can, in extreme cases, cause seizures and death.

    Chocolate is another risky sweet. While it’s a delight for humans, chocolate is poisonous to cats, notably darker chocolate, which is even more toxic. Chocolate consumption causes muscle tremors, arrhythmias and heart rate abnormalities. Cats should also avoid raisins and grapes, which can lead to kidney failure if ingested in small amounts.

    Furthermore, caffeine — whether found in coffee, tea or chocolate — can create symptoms similar to chocolate toxicity, which makes it equally as harmful to cats.

    What kind of cat food has the least amount of carbs?

    Good wet food is closer to your cat’s diet in the wild and has better nutritional qualities. Whereas dry meals can have problematic high-carb content, the level of carbs in wet food, including semi-moist and moist recipes, is low. These foods also are moist and contain around 70% moisture per serving, contributing to your cat’s hydration.

    Good hydration is key for nutrient adsorption, preventing digestive and urinary inflammations, and fighting chronic fatigue. Also, wet food is packed with protein; as you know, cats need more protein than other animals they are compared with, for example, dogs or omnivores.

    Proteins contribute to amino acid creation, muscle building, tissue production, and general body maintenance. Cats may develop metabolic abnormalities, chronic disease, or muscle wasting without adequate animal protein.

    Most wet food items contain well over 50% animal protein to meet your cat’s nutritional and energy needs. Wet food also provides variety, with many different textures, including gravy, minced meat, sliced meat, pate, jelly, puree and shredded meat, allowing you to rotate between different tastes at mealtimes easily.

    Does kibble contain sugar?

    The carbohydrates in kibble alone contain an average of 25% calories, which is considered a high-calorie diet. It includes meat, corn gluten meal, soybean meal, wheat flour, and brewer’s rice, among other plant-based products.

    These are the ingredients that increase the starch in dry food. The amount of sugar in kibble will vary with the amount of starch used, but it’s generally not to the extent that can be considered harmful, around 4-8%.

    But because cats don’t burn carbs for energy like we do, the excess carbs may pack on enough calories over time, leading to weight gain. However, dry food such as kibble is still palatable, digestible and safe for cats in moderation. Two flavours of Nature’s Variety’s Instinct line of pet food tested as the best kibble toppers.

    “It is always best to use kibble as a side dish to a canned or raw meal to balance out the higher carbohydrates found in kibble with a more protein-based meal of canned food,” Contin says.

    Related Articles: Is Cinnamon Poisonous to Cats? Is Vaseline Safe for Cats? Is Baking Soda Safe for Cats?

    Picture of Dr. Sajjal Fatima
    Dr. Sajjal Fatima

    Small Animal Veterinarian | DVM | Pet Health & Welfare Advocate

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