
Cats are obligate carnivores, meaning their diet requires nutrients only found in animal meat. Their digestive system is extremely sensitive, and many human foods that are safe for us can be harmful to cats. Blue cheese, for example, is known to contain roquefortine C, a toxin that is potentially fatal to cats and can cause vomiting, diarrhea, or lethargy. However, some sources suggest that small amounts of cheese are acceptable for cats to consume, with hard cheeses being the least likely to cause complications.
| Characteristics | Values |
|---|---|
| Toxicity | Blue cheese contains roquefortine C, a toxin that is potentially toxic to cats and can cause vomiting, diarrhoea, or lethargy. |
| Nutritional Benefits | Cheese does not offer any nutritional benefits to cats. |
| Safe Consumption | Cats can consume cheese in small amounts with no negative effects. However, blue cheese is mouldy and can be toxic to cats. |
| Gastrointestinal Issues | Eating blue cheese can cause gastrointestinal issues such as vomiting, diarrhoea, constipation, nausea, bloating, and flatulence. |
| Treat | Cheese should be considered a treat and not a regular part of a cat's diet, comprising no more than 10% of their daily calorie intake. |
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What You'll Learn
- Blue cheese can cause vomiting and diarrhoea in cats
- It contains roquefortine C, which is toxic to cats
- Cats are lactose intolerant, so dairy products can cause digestive issues
- Cats are obligate carnivores, so they don't need dairy in their diet
- Blue cheese is high in calories, so it should be a rare treat

Blue cheese can cause vomiting and diarrhoea in cats
Cats are obligate carnivores, meaning their diet requires nutrients only found in animal meat. Their digestive system can be extremely sensitive, and many human foods that are safe for humans can cause major health issues in cats. While cheese is generally considered safe for cats to eat in small quantities, blue cheese is an exception.
Blue cheese is formed from Penicillium, a type of fungus that grows on aging food. This fungus can be toxic to pets and produce a toxin called roquefortine C, which cats are particularly susceptible to. Ingestion of blue cheese by cats can cause vomiting, diarrhoea, lethargy, and other symptoms of gastrointestinal distress. Cats with pre-existing health conditions, such as heart or kidney disease, should especially avoid blue cheese as it can be unhealthy for them.
If you suspect your cat has eaten blue cheese, monitor them for abnormal behaviour, repeated vomiting, or weakness. In most cases, a few licks of blue cheese will not cause serious harm, but it is always best to consult your veterinarian, especially if symptoms worsen. To prevent such incidents, it is important to prevent cats from accessing human foods, especially dairy and mouldy cheeses.
It is worth noting that cheese should be considered a treat for cats and not a regular part of their diet. The majority of a cat's calories should come from commercially available cat food, which is formulated to provide them with the necessary nutrients. Additionally, treats should not exceed 10% of a cat's daily caloric intake, and cheese is high in calories.
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It contains roquefortine C, which is toxic to cats
Blue cheese is formed from Penicillium, a type of fungus that grows on aging food. While the mold is edible for humans, it can be toxic to pets. Blue cheese contains roquefortine C, which is toxic to cats and can cause vomiting, diarrhea, or lethargy. Ingestion of blue cheese by cats has also been linked to several deaths.
Roquefortine C is a toxin produced by overripe or festering blue cheese. Cats, along with dogs, are particularly susceptible to this toxin. Ingestion of blue cheese by cats can cause vomiting, diarrhea, and lethargy. Symptoms may overlap with vomiting caused by rapid eating, so it is important to monitor your cat for abnormal behavior, repeated vomiting, or weakness. If symptoms worsen, it is advised to seek immediate veterinary consultation.
To prevent accidental ingestion of blue cheese by cats, it is important to prevent access to human foods, especially dairy and moldy cheeses. While small amounts of cheese can be given to cats as an occasional treat, blue cheese and other moldy or "stinky" cheeses should be avoided due to the potential presence of roquefortine C and other toxins.
The majority of a cat's calories should come from commercially available cat food, which is formulated to provide them with the necessary nutrients. Human foods, such as cheese, should only be given to cats occasionally and in small quantities, and should never exceed 10% of their daily caloric intake. While blue cheese may be tempting for cats due to its high-fat content, it is important to remember that it can be toxic and should be avoided.
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Cats are lactose intolerant, so dairy products can cause digestive issues
Cats are obligate carnivores, meaning their diet requires nutrients only found in animal meat. Felines lack the necessary physiology to consume plant-based matter. In other words, dairy is not a natural part of a cat's diet, and cheese does not offer them any nutritional benefits. While cats can eat cheese in small amounts, eating too much can cause digestive issues.
Plain yogurt is easier for cats to digest compared to other dairy products because it contains 'good' bacteria that benefit the gut. Yogurt also has less lactose, so most cats can have a few bites without sensitivity. However, soft cheeses like Brie and cottage cheese are usually higher in lactose and can cause more complications for a lactose-intolerant cat.
Moldy or "stinky" cheese—like blue cheese—can be toxic to cats. Blue cheese contains roquefortine C, which is potentially toxic to cats and can cause vomiting, diarrhea, or lethargy. If you suspect your cat has eaten blue cheese, call your veterinarian right away.
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Cats are obligate carnivores, so they don't need dairy in their diet
Cats are obligate carnivores, which means they require nutrients that are only found in animal meat. Felines lack the necessary physiology to consume plant-based matter, and their digestive system can be extremely sensitive. Dairy is not a natural part of a cat's diet, and cheese does not offer them any nutritional benefits. In fact, eating cheese can lead to digestive issues and even be toxic for cats.
Blue cheese, for instance, contains roquefortine C, which is potentially toxic to cats and can cause vomiting, diarrhoea, or lethargy. While small amounts of cheese may not be harmful to cats, it is important to monitor them for any abnormal behaviour, repeated vomiting, or weakness. If symptoms worsen, immediate veterinary consultation is advised.
The belief that cats love dairy is one of the most enduring myths about felines. Cats do not need dairy in their diet and can obtain all the necessary nutrients from animal-based sources. In the wild, cats prey on small animals such as mice and birds, and as pets, their diet should mimic this natural diet as closely as possible.
Canned food with a high protein content of 40% or more and a low carbohydrate content of 10% or less is recommended by experts such as Dr. Deb Zoran, a professor at the Texas A&M College of Veterinary Medicine & Biomedical Sciences. This type of diet will also help your cat meet its daily water needs, as cats are used to getting a large percentage of their water from their food.
While some people may disagree and argue that vegetarian or vegan diets can be healthy for cats, there is currently insufficient scientific evidence to support this claim. Veterinarian Marla McGeorge, a cat specialist, argues that vegetarian and vegan diets fail to provide the necessary amino acids and nutrients that cats require. Therefore, it is best to stick to animal-based sources of nutrition for your cat and avoid dairy products, as cats are obligate carnivores and do not need dairy in their diet.
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Blue cheese is high in calories, so it should be a rare treat
Cats can eat small amounts of cheese, but blue cheese can be toxic to them. It contains roquefortine C, which is produced by the fungus Penicillium that grows on aging food. This can cause vomiting, diarrhoea, or lethargy in cats. Furthermore, blue cheese is very high in calories and should be considered a treat. Therefore, it should be given to cats on rare occasions and in small quantities.
While cats can eat cheese in small amounts, it is not a natural part of their diet and offers no nutritional benefits. Cats are obligate carnivores, meaning their diet requires nutrients found only in animal meat. Their digestive systems are extremely sensitive, and many human foods that are safe for humans can cause major health issues for cats. For example, cheese can lead to gastrointestinal problems, including diarrhoea, vomiting, nausea, bloating, and flatulence.
In addition, if your cat has health problems such as a heart condition, kidney condition, or diabetes, cheese can be unhealthy and should be avoided. The high-fat content in cheese can lead to obesity and secondary health complications. Therefore, treats should make up no more than 10% of a cat's daily calorie consumption.
It is important to monitor your cat for any abnormal behaviour, repeated vomiting, or weakness after consuming blue cheese. If symptoms worsen, immediate veterinary consultation is advised. To prevent your cat from consuming blue cheese, it is best to prevent access to human foods, especially dairy and mouldy cheeses.
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Frequently asked questions
Yes, blue cheese can be toxic to cats. Blue cheese contains roquefortine C, a toxin that can cause vomiting, diarrhoea, or lethargy in cats.
If your cat ate blue cheese, call your veterinarian right away. Monitor your cat for abnormal behaviour, repeated vomiting, or weakness.
It is unclear how much blue cheese is toxic to cats. Some sources say that a few licks of blue cheese will not harm your cat. However, others say that even a small amount of blue cheese can be toxic.
Cheese is generally considered safe for cats to eat in small quantities. However, it has very little nutritional benefit for cats and should be given as an occasional treat.
Moldy or "stinky" cheeses, such as blue cheese, can be toxic to cats. Nacho cheese can also be unsafe due to ingredients like onions and garlic.

























