Apple Seeds Toxicity in Dogs
Apple flesh is safe for dogs, but the seeds contain amygdalin — a cyanogenic glycoside that releases hydrogen cyanide when chewed and metabolized. A single apple's seeds are unlikely to cause serious harm to a medium or large dog, but intentional feeding of seeds, or a dog eating many apple cores, warrants caution and monitoring.
Sign in to log this event to your dog's health record.
A $95 consultation fee applies to ASPCA Poison Control calls.
⚡ Immediate Actions
- 1For a single apple — remove the core and seeds and monitor your dog; call vet if any symptoms appear.
- 2For large quantities of seeds or cores — call ASPCA Poison Control (888) 426-4435 immediately.
- 3If bright-red gums, gasping, or collapse occur, go to the emergency vet at once — these are signs of cyanide toxicity.
- 4Do not induce vomiting without veterinary guidance.
Symptoms & Timeline
Mild exposure (1–2 hours)
- Dilated pupils
- Excessive drooling
- Vomiting
- Diarrhea
- Panting
Severe cyanide toxicity (larger doses)
- Rapid heart rate followed by bradycardia
- Difficulty breathing / gasping
- Brick-red or bright-red mucous membranes
- Muscle tremors and seizures
- Collapse
ℹ️ Safe Amount Context
Apple flesh and skin are safe. Seeds from one average apple are very unlikely to harm a dog over 20 lbs, but repeated exposure or large quantities are dangerous.
How Apple Seeds (Amygdalin / Cyanide) Affects Dogs
Apple seeds contain amygdalin, a cyanogenic glycoside. When cells are crushed by chewing, beta-glucosidase enzymes release hydrogen cyanide (HCN). HCN binds to cytochrome c oxidase in mitochondria, blocking cellular respiration. Cells cannot use oxygen even when blood oxygen is normal, producing the paradox of bright-red venous blood (the hallmark of cyanide poisoning). Seeds that are swallowed whole without chewing release minimal cyanide.
Frequently Asked Questions
Can my dog eat apple slices?
Yes — apple slices without seeds or core are a healthy, safe treat for dogs. They provide fiber and vitamins. Always remove the core and seeds before feeding.
How many apple seeds does it take to poison a dog?
For a 20 lb dog, cyanide toxicity would require roughly 85+ seeds (the equivalent of multiple apples' worth of seeds). The risk from a single apple's seeds is very low. However, do not make seeds a regular part of your dog's diet.
Are seeds from other fruits also dangerous?
Yes. Pits and seeds from cherries, peaches, plums, apricots, and apples all contain cyanogenic glycosides. See the cherry-pits and stone-fruits entries for more detail.
🐾
Log what happened — keep a record for your vet
Free health journal: note symptoms, timing, and vet advice. Searchable history for future reference.
Create free account →No credit card required · Works in your browser