The nutrients that dogs must supplement include proteins, fats, carbohydrates, minerals, vitamins, amino acids and trace elements. Protein is the basis for the construction and repair of the cell of the dog; fat provides energy and protects the internal organs; carbohydrates are the calorie source of dogs; minerals such as calcium, phosphorus, potassium, magnesium and zinc can help dogs build strong bones and teeth; vitamins can help dogs regulate immunity, metabolism and healthy growth; amino acids can help dogs digest nutrition; finally, trace elements can help dogs digest and absorb nutrients.

Protein is broken down into amino acids in the dog's body, which is of great benefit to the various organs, muscles, blood, bones, hair, skin, toes and claws of the dog. Once fat enters the body, it will stop in the digestive organs for a long time and give a sense of fullness. When excessive fat is given and the amount of exercise continues to be insufficient, the accumulated fat will become the cause of obesity.

In addition to protein, fat, and carbohydrates, minerals and vitamins are indispensable to the dog's body. If minerals and vitamins are insufficient, it will affect the development of the dog's bones and its resistance to diseases.