Can Cats Eat Peanut Butter: Why Caution Is Necessary When It Comes to Feeding Your Cat Peanut Butter

Yes, cats can technically eat peanut butter. However, while peanut butter is not toxic to cats, it is not recommended as a regular part of a cat’s diet. This is because most peanut butter contains added sugar and salt, which are unhealthy for cats. Additionally, some cats may have a sensitivity or allergy to peanuts.

If you want to give your cat a small amount of peanut butter as an occasional treat, choosing a natural peanut butter that does not contain added sugar or salt is important. You should also make sure only to give your cat a very small amount, as too much peanut butter can cause gastrointestinal upset, such as vomiting or diarrhea.

The Risks of Feeding Peanut Butter to Cats

Digestive Upset

Cats may experience digestive upset from consuming peanut butter because it is high in fat and sugar, which their digestive system does not tolerate well. Most cats are lactose intolerant, meaning they cannot digest lactose, a sugar in milk and dairy products. In addition, many types of peanut butter contain milk solids, which can cause digestive upset in lactose-intolerant cats.

Peanut butter is high in fat, which can be difficult for cats to digest. Consuming too much fat can lead to diarrhea, vomiting, or other digestive issues. Many types of peanut butter also contain added sugar, which can cause a rapid increase in blood sugar levels and lead to digestive upset.

Some types of peanut butter may further contain xylitol, a sugar substitute that can be toxic to cats. For example, xylitol can cause a rapid insulin release, leading to hypoglycemia or low blood sugar levels, seizures, and liver failure.

Allergic Reactions

Like humans, cats can develop allergic reactions to peanuts and peanut butter. Peanuts contain proteins that can trigger an immune response in cats that are allergic to them. These allergens can cause various symptoms, including itching, skin irritation, swelling, vomiting, or diarrhea.

Cats that are allergic to other types of nuts, such as walnuts or almonds, may also be allergic to peanuts due to cross-reactivity. This occurs when the immune system mistakenly identifies the proteins in peanuts as a threat and mounts an allergic response.

If you suspect that your cat may be allergic to peanuts or any other food, it’s important to consult with a veterinarian. Your veterinarian can perform allergy testing and recommend an appropriate treatment plan to manage your cat’s symptoms. In addition, your veterinarian may recommend emergency treatment to prevent life-threatening complications in severe allergic reactions.


Peanut butter is calorie-dense, which contains many calories in a small serving. A single tablespoon of peanut butter can contain up to 94 calories, a significant amount for a small animal like a cat. As mentioned, many types of peanut butter contain added sugar, which can contribute to weight gain if consumed excessively.

If peanut butter is fed to cats as a treat or snack, it can contribute to an unbalanced diet. Overconsumption of treats can lead to an imbalanced intake of nutrients, leading to deficiencies or excesses that can contribute to obesity.

To prevent obesity in cats, it’s important to feed them a nutritionally complete and balanced diet appropriate for their age, weight, and activity level. Treats should be given in moderation and not make up a significant portion of their daily calorie intake. 


Pancreatitis is characterized by inflammation of the pancreas, an organ responsible for producing enzymes that help digest food and regulate blood sugar levels. While there are many causes of pancreatitis in cats, one possible cause is consuming high-fat foods, such as peanut butter.

When a cat eats high-fat foods, such as peanut butter, it can cause the pancreas to work overtime to produce the necessary digestive enzymes to break down the fat. Over time, this can lead to inflammation of the pancreas and, in some cases, pancreatitis.

Furthermore, some cats may have underlying health conditions or predispositions that make them more susceptible to pancreatitis. For example, obese cats, cats with diabetes, or cats with liver disease may be more likely to develop pancreatitis after consuming high-fat foods like peanut butter.

Sodium poisoning

Sodium poisoning, also known as hypernatremia, is a condition that occurs when the sodium levels in a cat’s bloodstream become too high. While it’s rare for cats to develop sodium poisoning from eating peanut butter, it’s possible in certain circumstances.

Peanut butter itself is not particularly high in sodium. However, some peanut butter varieties, particularly those marketed as “natural” or “organic,” may contain added salt or other sodium-containing ingredients to enhance flavor or texture.

If a cat consumes a large amount of peanut butter that contains high levels of sodium, it can lead to an imbalance in its electrolyte levels, which can cause a range of health issues. Additionally, suppose a cat has an underlying health condition that affects its ability to regulate its sodium levels, such as kidney disease. In that case, it may be more susceptible to sodium poisoning from consuming even small amounts of high-sodium foods.

Symptoms of sodium poisoning in cats may include excessive thirst and urination, lethargy, vomiting, diarrhea, seizures, and coma. For example, suppose you suspect your cat has consumed much peanut butter or other high-sodium food and is exhibiting any of these symptoms. In that case, it’s important to seek veterinary care immediately.

To prevent sodium poisoning in cats, it’s important to be mindful of the sodium content of the foods you’re feeding them and avoid giving them foods particularly high in sodium, such as processed meats, cheese, and salty snacks. Additionally, it’s important to ensure that your cat has access to clean, fresh water at all times, as adequate hydration is essential for regulating electrolyte levels.