As a veterinarian, I often get asked about cats and acorns, especially in the fall when these nuts are plentiful. I want to clarify right away: acorns are not safe for cats.
While cats are obligate carnivores and typically don’t seek out plant matter, they can be curious about fallen acorns. In this guide, I’ll explain the risks and what to do if your cat nibbles on one.
Is It Safe or Toxic and Why?
Acorns are not safe for cats. They contain tannins and gallic acid, which can cause gastrointestinal upset, including vomiting and diarrhea. In larger amounts, acorns may lead to more severe toxicity, affecting the kidneys and liver. Additionally, whole acorns pose a choking hazard or can cause intestinal blockages, especially in smaller cats. While not as acutely toxic as grapes or onions, acorns are still considered unsafe.
Health Benefits or Risks
Acorns offer no health benefits for cats. They are high in tannins, which are antinutrients that can interfere with mineral absorption. The risks far outweigh any potential benefits. Even small amounts can cause digestive issues, and chronic ingestion could lead to kidney problems. There is no reason to include acorns in your cat’s diet.
Safe Serving Size and Preparation (If Applicable)
There is no safe serving size for acorns for cats. They should be avoided entirely. Unlike for humans, who can eat properly leached acorns, cats lack the digestive enzymes to process them safely. Do not offer acorns in any form-raw, roasted, or ground. Keep acorns out of reach to prevent accidental ingestion.
Symptoms of Trouble
If your cat eats acorns, watch for signs of gastrointestinal distress such as vomiting, diarrhea, loss of appetite, drooling, or abdominal pain. More severe symptoms include lethargy, dehydration, or signs of an intestinal blockage like straining to defecate or a swollen abdomen. If you notice any of these, contact your veterinarian immediately.
What to Do If Your Cat Ate Too Much
If you suspect your cat has eaten acorns, especially in large quantities, contact your veterinarian or the ASPCA Animal Poison Control Center at (888) 426-4435. Do not induce vomiting unless instructed by a professional. Bring a sample of the acorn or vomit to the vet if possible. Treatment may include supportive care such as fluids, medications for vomiting, or even surgery in case of an obstruction.
Safety note: Always keep acorns and other tree nuts out of reach of your cat, and consult your veterinarian if you have any concerns about what your pet has ingested.