Apples and bananas can be used as complementary foods and fed in appropriate amounts, but it is recommended to remove the core or seeds because the core is small and some seeds contain cyanide. If the dog accidentally swallows it, it may easily cause poisoning or intestinal infarction. . However, it is best not to give dogs some fruits with pungent smells and sweet tastes such as grapes, mangoes, strawberries, and watermelons. Grapes are the most deadly and can even cause kidney failure in dogs.