... eggs chicken and dorking, four layers, 8 doors.5. Feeding advantage: each set can feed baby 400 ... and increase the space utilization raised 1-1.5 times; Cast dose reduce 50 to 70 per ... 1 times, improve survival rate as high as 99.5% effectively, Comparing with the other cage ,each ... national patent and the patent number is ZL03263042.5.7.Characteristics: save medicine and material, Easy management ...