This chapter focuses on the advances in the use of hemp in livestock feed. It discusses the current legal status of hemp use in livestock and poultry diets. It reviews existing research on the inclusion of hemp and its by-products in animal feed, focusing on their effects on animal health, performance, and food quality. The chapter also explores hemp as an alternative feed ingredient in livestock and poultry production. Additionally, it summarizes studies on the impact of feeding hemp by-products to both ruminant and monogastric animals and examines future opportunities for incorporating hemp and its by-products into animal feeding system.