Can Cats Eat Peanuts?

Conditional: plain, unsalted peanuts or small amounts of peanut butter are not acutely toxic to cats but offer little nutritional benefit and carry choking, salt, fat and aflatoxin risks.

Quick Safety Summary

• Verdict: CONDITIONAL — Plain, unsalted, shelled peanuts or a tiny amount of natural peanut butter can be given as an occasional treat, but peanuts are not necessary for a cat’s diet and carry several risks (choking, added salt, high fat, and rare aflatoxin contamination).
• Emergency: If your cat eats salted peanuts, peanut shells, a large volume, or shows vomiting, tremors, weakness, jaundice, seizure or breathing difficulty, call ASPCA Animal Poison Control at (888) 426-4435 or your veterinarian immediately.

Can cats eat peanuts? The short answer

Conditional: cats can eat plain, unsalted, shelled peanuts or small amounts of peanut butter as an occasional treat, but they gain no essential nutritional benefit from peanuts and face specific risks (choking, high calories/fat, salt toxicity, and possible aflatoxin contamination).

Cats are obligate carnivores — their nutritional needs center on high-quality animal protein and nutrients like taurine that are absent from plant foods. Peanuts are not toxic to cats in the way chocolate or xylitol is to dogs, but they are also not a good cat food or regular treat.

What’s in a peanut? Nutritional data and why it’s irrelevant for cats

Typical nutritional values for raw peanuts (per 100 g):

• Calories: ~567 kcal
• Protein: ~25–26 g
• Fat: ~49–50 g (mostly unsaturated)
• Carbohydrate: ~16–17 g
• Fiber: ~8–9 g
• Sodium: negligible in plain peanuts, high if salted

Why this matters for cats:

• Protein type: Peanut protein is plant-based and lacks certain essential amino acids for cats (notably taurine), so it cannot replace animal protein in the diet.
• High fat and calories: A few peanuts or a small spoonful of peanut butter can represent a significant caloric load for a small cat and may contribute to pancreatitis in sensitive animals.
• Micronutrients: Peanuts contain healthy fats, vitamin E and some minerals, but these do not substitute for the nutrients cats need from meat.

Toxicology and contamination risks

Aflatoxins

• Peanuts are susceptible to contamination by Aspergillus fungi, which can produce aflatoxins — potent liver toxins and carcinogens.
• Aflatoxin exposure in animals can cause poor appetite, vomiting, diarrhea, jaundice, bleeding, and liver failure.
• While commercial peanut products are regulated, spoiled or moldy peanuts (or homemade batches stored improperly) may pose higher risk.

• Salted or seasoned peanuts can cause sodium overload. Symptoms of salt toxicosis include vomiting, diarrhea, excessive thirst, restlessness, tremors, seizures and neurologic signs.

• True peanut allergy is uncommon in cats but possible. Signs include facial swelling, hives, vomiting, diarrhea, and breathing difficulty.

• Diets very high in fat may trigger pancreatitis in some pets. Peanuts and peanut butter are high in fat and should be limited in cats with a history of pancreatic disease.

• Peanut shells are fibrous and indigestible. Ingestion can cause mouth irritation, choking, or gastrointestinal obstruction, especially if several shells are swallowed.

Peanut butter: safer or riskier?

• Natural peanut butter (ingredients: peanuts ± a small amount of salt or oil) is less risky than sweetened or flavored peanut butter.
• Avoid any peanut butter that contains xylitol (a sugar substitute). Xylitol is highly toxic to dogs; its toxicity in cats is less documented but still a hazard to avoid.
• Many commercial peanut butters contain salt, sugar and additives — these increase calorie load and can cause gastrointestinal upset.

Serving-size guidance (practical recommendations)

General rule: Keep peanuts and peanut butter strictly as an occasional, tiny treat — not more than 1–2% of daily caloric intake.

Example portions by cat weight (adult healthy cats):

• 3 kg (6.6 lb) cat: 1 shelled peanut or 1/4 teaspoon of natural peanut butter (approx. 5–10 kcal)
• 4.5 kg (10 lb) cat: 1–2 shelled peanuts or 1/2 teaspoon peanut butter (approx. 10–15 kcal)
• 6 kg (13 lb) cat: 2 shelled peanuts or up to 3/4 teaspoon peanut butter (approx. 15–20 kcal)

• These are maximum occasional treats. Even small amounts are calorically dense: a single peanut kernel contains roughly 4–7 kcal depending on size, and 1 teaspoon of peanut butter is roughly 30–35 kcal.
• Compare to a typical indoor adult cat calorie need (~180–250 kcal/day). A teaspoon of peanut butter can be >10% of daily calories for a small cat.
• Avoid peanut shells and salted/seasoned nuts. Do not make peanut butter a regular part of the diet.

When to call the vet or poison control

Call your veterinarian or ASPCA Animal Poison Control immediately at (888) 426-4435 if any of the following occur after peanut or peanut product ingestion:

• Ingestion of a large quantity of peanuts, peanut butter, or peanut shells
• Consumption of salted, flavored, or moldy peanuts
• Signs within hours: vomiting, diarrhea, abdominal pain, lethargy, tremors, seizures, difficulty breathing
• Jaundice (yellow gums/skin), bleeding, or sudden decline in energy (possible aflatoxin/liver damage)

What to have ready when you call:

• The product packaging (ingredients, salt content, xylitol presence, lot number)
• Approximate amount eaten and the time of ingestion
• Your cat’s weight, age, health history and current symptoms

Practical feeding tips and safer alternatives

• If you want to offer variety: small pieces of cooked lean chicken, fish (cautiously), or a cat-specific treat are better, nutritionally appropriate choices.
• For peanut butter as a lick toy: use only a tiny smear of plain, unsalted, xylitol-free natural peanut butter on a spoon or lick mat. Monitor closely and limit to once in a while.
• Never give whole peanuts in the shell, and do not let cats chew on peanut shell fragments.

Sources and further reading

• ASPCA Animal Poison Control: https://www.aspca.org/pet-care/animal-poison-control (hotline: 888-426-4435)
• American Veterinary Medical Association (AVMA): https://www.avma.org
• USDA nutrient database for peanuts
• CDC/FDA information on aflatoxins and food contamination

Key Takeaways

• Peanuts are CONDITIONAL: not acutely toxic in small, plain amounts, but offer no essential nutrients for cats and carry risks (choking, fat, salt, aflatoxin).
• Keep portions tiny and infrequent: 1–2 peanuts or up to 1/2 teaspoon of natural peanut butter for an average adult cat, depending on body weight.
• Avoid salted, flavored, moldy peanuts, peanut shells, and any peanut butter containing xylitol.
• For suspected poisoning, salt toxicosis, aflatoxin exposure, or severe symptoms, call ASPCA Animal Poison Control at (888) 426-4435 or your veterinarian immediately.

Frequently Asked Questions