Eating pork liver is a common way for dogs to supplement nutrients because it is rich in protein, vitamins and minerals, which help maintain the dog's health. However, it should be noted that although pork liver is rich in nutrients, it should not be consumed in excess, otherwise it may cause indigestion, obesity and other problems in dogs. 
When feeding pork liver to a dog, it is recommended to first cook it, debone it, and cut it into small pieces. The cut should not be too large to make it difficult for the dog to chew. In addition, in order to ensure a balanced nutrition for dogs, in addition to pork liver, other kinds of meat, fish, vegetables, fruits and other nutrients need to be provided. Choosing the right dog is a good choice, because it is professionally proportioned to provide the comprehensive nutrition that your dog needs. 
If you are worried that your dog is deficient in trace elements or other nutrients, you can buy calcium powder and trace element powder for pets to supplement. These products have been specially developed to provide a comprehensive nutritional supplement for the specific needs of dogs. 
In conclusion, a reasonable feeding method is very important for the health of the dog. It is advisable to follow veterinarian recommendations and feeding recipes to ensure that your dog receives a complete and balanced diet. At the same time, it is also necessary to pay attention to the dog's diet and physical condition, and adjust the feeding plan in time to ensure the healthy growth of the dog.