This study aimed to determine the energy consumption in manufacturing the rabbit, poultry and large animal feed pellets and crushed, by determining the energy consumed in each stage of processing to assess the most consumable stage in the different types of feed. Grinding and pelletization stages were the most consumable in the feed processing and evaluated in terms of energy and product quality at different operational conditions. The results indicated that the total energy consumed were 243.55, 217.25 and 100.67 kJ/kg for rabbits, poultry and large animals feed pellets, respectively. The crushed feed processing consumed less energy where, it was 30.70 and 30.82 kJ/kg for large animals and poultry, respectively. In comparison between the specific energy consumption of different types of feeds, it could be concluded that to produce one kg of rabbit feed pellets consumed energy as 2.43 times as of large animals feed pellets and 8 times as of the energy consumed of crushed feed of large animals. Mill performance, specific energy, energy density, grinding index and grinding ability index ranged from 0.70- 6.83 Mg/h, 3.38- 32.72 kJ/kg, 1.99- 18.82 MJ/m3, 12.35- 91.28 kJ.mm0.5/kg and 0.81- 6.00 kJ/m2, respectively. Mean weight diameter, size reduction, bulk density and grinding effectiveness ranged from 1.47- 2.89 mm, 2.60- 5.10 times, 524.58- 621.34 kg/m3 and 8.88- 14.40 respectively. The pelletization energy consumption ranged from 179.14- 204.60 kJ/kg for rabbits, 163.60- 184.87 kJ/kg for poultry and 41.06- 59.67 kJ/kg for large animal feed pellets. The compression and shear forces of pellets ranged from 277.16- 309.11 and 30.12- 38.02 N, respectively for rabbits feed pellet, 99.22- 106.08 and 25.60- 29.60 N, respectively for poultry feed pellets and 135.63- 242.08 and 59.92- 104.66 N, respectively for large animals feed pellets. The study revealed that the total cost was 144.02 LE./Mg for rabbits feed pellets as compared with 115.21 LE./Mg for poultry feed pellets, while the total costs for the large animal feed pellets was much lower than that of both rabbit and poultry feed pellets, where it recorded 50.85 LE./Mg. The cost of manufacturing crushed feeds for both poultry and large animal were similar, where it was 14.41 LE./Mg.
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