Apple flesh is generally safe for cats in small, occasional amounts. However, the seeds, stem, and core contain cyanide and should always be removed before offering to your cat. Ingesting a large number of seeds could lead to cyanide poisoning, though this is rare.
How It Affects cats
Cyanide inhibits cytochrome c oxidase, disrupting cellular respiration and oxygen utilization.
Toxic Compound
cyanide (in seeds)
Disclaimer: This information is for educational purposes only. Always consult your veterinarian before making changes to your pet's diet.