The fats added include both plant and animal fats. The plant fats that can be used are: soybean oil and oil foot, soybean lecithin oil, rapeseed oil, camellia oil, peanut oil, corn umbilical oil, etc.; optional animal fats are: lard, butter, sheep oil, fish oil, Chicken oil and other livestock oil. The fat added to the pellet feed must be fresh and of good quality and must not have mildew; the animal fat should be chopped into a pure oil, the extraction of the oil residue, or the oil residue is ground together with the net oil Feed. The proportion of oil is generally 2%, the highest in winter can reach 3%, the minimum summer heat can be 0.5%. If excessive fat is added, it will cause diarrhea. The benefits of adding fat to Rex rabbits' pellet diet are: 1. Supplementary deficiencies in fat content in normal diets to meet the special needs of rex rabbit fur growth. 2, play a maintenance role on the pellet feed machine. All feed granulators that process fats and fats are often processed with smooth plates and holes, and the machines are operating normally. They often remain in good condition and extend their service life. 3, pellet feed shape is good.