Animal Review 2412-3382 2409-6490 10.18488/journal.ar.2018.52.22.33 Animal Review Study of Factors Linked to the Variation in Rentability in the Farming of Broiler Chickens in Northeast Algeria Animal Review Animal Review 06-2018 2018 06-2018 06-2018 5 2 22 33 04 Sep 2018 12 Nov 2018 Obtaining good zootechnical performance in broiler chicken farming requires continuous and regular zootechnical and sanitary monitoring throughout the breeding period to increase its rentability. Our work carried out at the level of private broiler chicken farming in Eastern Algeria with the objective of comparing zootechnical performance during the breeding period with that obtained under the optimal conditions of strain ISA 15. Whose controlled and compared parameters show: a very high mortality rate- a very low weight evolution- a higher consumption index.