It is okay for dogs to accidentally eat a small amount of apple cores. Moreover, apple cores are relatively small and generally dogs will not chew them. If they are excreted with the feces after eating, there will be basically no impact.
But if the dog eats apple cores frequently, it may cause poisoning, because the apple There is a certain amount of cyanide in the core, which can cause symptoms such as dizziness, vomiting, diarrhea, difficulty breathing, and coma in dogs. Therefore, after the dog eats the apple core, close observation is required. If the dog is found to have symptoms of vomiting and diarrhea, send it to the hospital for treatment in time.