Benefits

1. Apples have high nutritional value and low fat content. Dogs can supplement their nutrition by eating some apples without gaining weight.

2. The pectin contained in apples can help dogs’ gastrointestinal digestion and strengthen their stomachs.

3. Apples are rich in vitamins and minerals, which are helpful for the growth of dogs.

4. Apple has a sweet and sour fragrance and can be used as a flavoring agent to improve the dog's appetite.

Disadvantages:

1. Apple stems, seeds and leaves contain cyanide, which can cause poisoning if dogs eat large amounts.

2. Some dogs are not good at chewing food. If they swallow apples directly, they will choke and die of suffocation easily.