What can dogs be poisoned by eating?

Dogs will be poisoned if they ingest food containing alkaloids, such as theobromine and theophylline, which can cause damage to the dog’s kidneys. Dogs will be poisoned if they ingest onions, green onions, garlic, etc. Such items can cause hemolysis of the dog's red blood cells and cause hypoxia.

Some fruits that are good for dogs, such as apples, contain cyanide in their seeds and cores, which are fatal poisons for both humans and dogs. Cyanide can also be present in a dog's intestines and cause death without warning within 24 hours. It is good for dogs to eat fruits, but it is very dangerous to eat the seeds and cores inside.