Why Is My Dog Eating Acorns? Is it Safe?


If you have spotted your dog crunching fallen acorns, you are not alone. Dogs explore with their mouths, and acorns can seem like tiny toys. The problem: acorns can be hazardous. Here is why dogs eat them, the risks to watch for, and how to keep your pup safe.

Quick answer: Acorns are not safe for dogs. They can cause stomach upset, intestinal blockages, and exposure to tannins. Contact your veterinarian if your dog eats acorns or shows symptoms.

Why Dogs Are Attracted to Acorns

  • Curiosity: New scents and textures invite investigation.
  • Play factor: Acorns roll and bounce like mini fetch balls.
  • Boredom or hunger: Low enrichment or an empty belly can lead to opportunistic snacking.

Are Acorns Dangerous for Dogs?

Yes. Even small amounts can cause problems.

  • Gastrointestinal upset: Vomiting, diarrhea, drooling, or abdominal discomfort.
  • Blockages: Whole acorns or shell fragments can obstruct the throat or intestines.
  • Tannin exposure: Acorns and oak parts contain tannins that can irritate the GI tract.

Signs Your Dog May Have Eaten Acorns

  • Drooling or pawing at the mouth
  • Loss of appetite
  • Vomiting or diarrhea, sometimes with blood
  • Lethargy or weakness
  • Abdominal tenderness or restlessness

What To Do If Your Dog Ate an Acorn

  1. Remove access: Gently take away remaining acorns.
  2. Call your veterinarian: Share your dog’s size, when ingestion happened, and how many acorns you think were eaten.
  3. Monitor closely: Watch for vomiting, diarrhea, bloating, or behavior changes.
  4. Emergency help: If your vet is unavailable and your dog shows concerning signs, contact the Pet Poison Helpline.

How To Prevent Your Dog From Eating Acorns

  • Leash management: Keep your dog close in oak-heavy areas and steer around dense patches.
  • Yard cleanup: Rake and dispose of acorns regularly if you have oak trees.
  • Training cues: Reinforce “leave it” and “drop it.” Practice at home with safe items before trying it outdoors.
  • Bring alternatives: Carry a toy or long-lasting chew on walks to redirect interest.
  • Meal timing: A short walk after a meal can reduce foraging behavior driven by hunger.

Frequently Asked Questions

Are acorns poisonous to dogs?

Acorns can be hazardous. Tannins may irritate the GI tract, and whole acorns can cause blockages. Avoid letting your dog eat them.

What if my dog only ate one acorn?

One acorn can still cause GI upset or become a choking hazard. Contact your veterinarian for guidance and monitor your dog for symptoms.

Can dogs chew on oak sticks or leaves?

Oak parts can also contain tannins and may splinter. Offer safe chew alternatives and redirect with training cues.

How do I teach “leave it” fast?

Start at home with a low-value treat in a closed hand. When your dog disengages, mark and reward with a higher-value treat. Gradually practice with items on the floor, then outside around acorns.