A broiler eats about 4.25 kg of feed from day-old to the end of the 8th week. If you multiply that by 100 birds, that would be (4.25kg X 100) = 425 kg or 17 bags of feed for 8 weeks. Therefore you need about 4,250kg or 170 bags of feed for 1000 broiler chickens from day-old until the end of the 8th week.