The common housefly (Musca domestica), a ubiquitous presence in various environments, has been a subject of scientific investigation for over a century. This chapter explores the potential use of housefly larvae as a sustainable animal feed ingredient. Their ease of rearing, rapid growth, high nutritional value, and environmental benefits in nutrient recycling have revived interest in using them as an alternative protein source for food and feed. Despite these advantages, housefly larvae have not achieved significant commercial viability. The chapter examines key challenges and ways of achieving successful commercial production.