Can dogs eat coins (especially pennies)?
If your dog has just eaten coins (especially pennies)
Do this now
- Go to the emergency vet immediately — this is a time-sensitive toxicity, not just an obstruction
- If you know the coin type and date, provide this info (pre-1982 pennies less toxic)
- Do NOT induce vomiting without vet guidance — coin may be stuck
- Your vet will take X-rays to confirm presence and location
- Removal is usually endoscopic (if in stomach) or surgical (if in intestines)
- Watch for: vomiting, pale gums (anemia), yellow skin/eyes (jaundice), dark urine, weakness
What your vet will want to know
Have this information ready when you call:
- Type of coin (penny, nickel, dime, quarter)
- Year of the coin if known (pre- or post-1982 for pennies)
- How many coins
- Your dog's weight
- Time of ingestion
The full picture
Coins are a unique emergency because they combine two separate dangers: mechanical (foreign body obstruction) and chemical (heavy metal poisoning). US pennies minted after 1982 are 97.5% zinc with a thin copper coating. Once the penny sits in the stomach, hydrochloric acid dissolves the copper coating and begins releasing zinc into the bloodstream. Zinc toxicity causes severe hemolytic anemia (destruction of red blood cells), jaundice, kidney damage, and can be fatal within 48-72 hours. Other coins (quarters, dimes) are primarily copper-nickel — still a foreign body risk but much less toxic. Pre-1982 pennies are 95% copper and also lower risk. Galvanized metal objects, zinc die-cast toys, and some nuts/bolts can cause the same toxicity. Always know what kind of coin was swallowed — if a penny is possibly post-1982, treat as a poisoning emergency, not just an obstruction.
Risks to watch for
- Zinc toxicity (pennies post-1982): hemolytic anemia
- Kidney failure from zinc toxicity
- Liver damage
- Intestinal obstruction (especially multiple coins)
- Choking on larger coins (quarters, half dollars)
- Stomach lining damage from acid + zinc interaction
Symptom timeline
Symptoms typically progress in stages. Knowing what to expect helps you act fast:
- 0–12 hours Usually asymptomatic; possible mild stomach upset
- 12–48 hours Zinc toxicity emerging: vomiting, lethargy, pale gums, yellow tinge to gums/eyes, dark urine
- 48–72 hours Severe anemia: weakness, collapse, rapid breathing, requires transfusion
Breed-specific warnings
- Small dogs face much higher zinc toxicity per coin — one penny can be lethal to a Chihuahua.
- Puppies disproportionately affected.
Safe portion size
None.
Safer alternatives
- Keep coin jars above dog-reach
- Empty pockets before laundry
- Check furniture cracks regularly
Common questions
Why are pennies specifically dangerous?
Post-1982 US pennies are 97.5% zinc. Zinc is corrosive to red blood cells — once absorbed, it causes hemolytic anemia. A single penny contains enough zinc to seriously harm a small dog. Pre-1982 pennies are mostly copper and much less toxic.
What about other coins — quarters, dimes?
Still foreign bodies requiring removal, but much less chemically toxic. Quarters are primarily copper-nickel (cupronickel). The main risk with larger coins is obstruction and choking, not poisoning.
What if my dog already passed the penny — is it OK?
Not necessarily. Zinc absorption happens while the coin is in the acidic stomach. If the coin has moved to the intestines or passed in stool, zinc absorption may have already occurred. Your vet may want blood tests to check for anemia 24-48 hours later.
How much does treatment cost?
Endoscopic coin retrieval: $1,500-$3,000. Zinc toxicity treatment (if absorption has occurred): blood transfusions, chelation therapy — can be $3,000-$8,000+. Pet insurance highly recommended.
Unexpected vet bills can run into thousands
One emergency visit for food poisoning can cost $500–$10,000+. Compare US pet insurance in 60 seconds.
Learn about vet costs & insurance →Sources
The information on this page is compiled and cross-checked against these authoritative US veterinary and toxicology sources:
- ASPCA Animal Poison Control Center — 24/7 poison hotline and comprehensive toxic food database
- Pet Poison Helpline — veterinary toxicology service
- Merck Veterinary Manual — peer-reviewed clinical reference
- American Veterinary Medical Association (AVMA)
- American Kennel Club Expert Advice
- Cornell University College of Veterinary Medicine
Specific toxicity thresholds cited on this page come from the above sources; where they disagree, we cite the more conservative figure. Numbers are general guidance — individual dogs vary in sensitivity based on age, breed, medications, and health conditions. When in doubt, always call your vet.
Checked against US veterinary guidance — see our editorial standards and source list. If your dog has eaten something and you need urgent advice, call a vet or the ASPCA Animal Poison Control Center on (888) 426-4435.