There are 7 kinds of our fruits that dogs must not eat: cherries, pears, and sugar cane. Eating these three fruits will cause kidney and gastrointestinal damage to dogs; pineapple and mango, these two fruits are eaten by dogs. Allergies and dehydration will occur later; grapes, after being eaten by dogs, can cause food poisoning and severe death; avocado, which is the most serious food for dogs, can cause decreased heart function, difficulty breathing, and chest fluid accumulation.