Common foods in the liver have high nutritional value, and the main nutritional components are: protein, fat, carbohydrate, vitamin A, vitamin D, phosphorus and so on. The content of vitamin A exceeds that of milk, eggs, meat, fish and other foods. The foul smell of the liver has a soft spot for dogs. Dogs like the smell. The key is that the liver is cheap and nutritious. It is really a kind of dog food. However, we should also pay attention to the amount of liver. After all, we should mainly eat dog food to avoid eating too much liver and taking too much vitamin A, which may lead to the danger of dog poisoning.