... chicken and dorking, four layers, 8 doors.5. Feeding advantage: each set can feed baby 400 chicks, ... the weight difference is 80-140.6.The feeding save space, and increase the space utilization raised ... energy saving 50 to 70 per cent, save feeding man-hour more than 1 times, improve survival ... rate as high as 99.5% effectively, Comparing with the other cage ,each group can reduce investment 200 ...