Dr. Mark is a veterinarian. He has been working with dogs for more than 40 years.
Dogs should not eat apple cores. The most common reason most websites claim for this is that the seeds in apples contain some cyanide, which has the potential to be lethal to your pet.
Cyanide Isn't What You Need to Worry About
Actually, the amount of cyanide in an apple seed is very low, only about 0.6mg per gram, and since a seed only weighs about 0.7 grams, even a tiny 2-kilogram Maltese or Chihuahua would have to eat more than 10 seeds—or a couple of apple cores—to experience toxicity. A big dog like a Labrador would have to eat over 200 seeds to be toxic. (1)
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Apple Cores Can Cause Choking or GI Blockages
The main reason dogs should not eat apple cores, besides the potential of being poisoned by the seeds, is that cores can cause choking and maybe even blockages in some dogs, which can lead to constipation or even obstipation.
I feed my dogs apple slices each morning when I am feeding my parrots and do not feed the core. If your dog sits under the apple tree and eats a whole apple, you should watch for GI upsets, but there is not much to worry about.
- Cope, R. B. (2022, April 18). Cyanide Poisoning in Animals. MSD Veterinary Manual. https://www.msdvetmanual.com/toxicology/cyanide-poisoning/cyanide-poisoning-in-animals
This article is not meant to substitute for diagnosis, prognosis, treatment, prescription, or formal and individualized advice from your veterinarian. Animals exhibiting signs and symptoms of distress should be seen by a veterinarian immediately.
© 2022 Dr Mark