Puppies cannot eat sharp bones such as chickens and ducks, which can easily scratch the intestines and cause internal bleeding, which is harmful to the dog's health. Generally, puppies are given large bones from pigs and cows to chew on to help them grind their teeth. Puppies should not eat chocolate or grapes. Eating chocolate can cause central nervous system diseases, and eating grapes can cause acute renal failure.

Dogs cannot eat green onions, onions and other foods. Some dogs eating such foods can cause cell hemolysis and blood in the urine. Puppies should not eat pineapples, cherries and other fruits, as they will be harmful to the dog.