A farmer in Vietnam, Mr. Le Phuoc Sang, has successfully bred black soldier flies for animal feed, reducing feed costs and providing a more sustainable source of protein. The technique involves rearing the flies and using their larvae as food for chickens, ducks, and fish. The article highlights the potential of black soldier fly farming to replace industrial feed and notes that the practice is legal and environmentally friendly. It also mentions the financial benefits of the industry, with black soldier fly eggs and larvae fetching high prices. The Department of Livestock Production plans to develop a guide for farming these flies and invest in modern technology to extract protein and oil for livestock feed.