Hello. Because the head and upper body are fully formed and the lower body is behind in terms of fetal development. There is only a genetic problem, that is, roosters and chickens are siblings. You have to bring a new rooster from another farm. And during the whole setter period, especially up to 14 days, do not open the setter door and do not open the setter door more than 3 or 4 times until the completion of the period, and you should raise the temperature of the setter room to 37 degrees, and especially since the brand of your device is not good, the temperature of the setter room Keep it constant and to keep the setter temperature constant, a window of 20 x 20 is enough. Just one window. Finally, fill the capacity of the machine to 70% and put it in the oven. Put the bigger eggs in the lower floors of the machine so that they lose more weight than the smaller eggs and finally the exhaust air outlet of the machine does not twist and the outlet pipe is at least 1 meter from the roof so that it gets good suction in the first period of the temperature. Start with 5.36 and end the hatching period with 7.36 in the last week and keep the humidity at 15 in the device. In the morning of the 41st day, raise the room temperature and remove any broken or uncracked eggs from the side of the air bag with a sharp tool like a Put a very sharp nail on the horse so that you don’t have a dead puppy and you will spend until the 44th day. And another thing, because your device is not a good brand, you raised the temperature on the night of the 18th. Know that to remove the eggs from the machine, just open one door of the machine and quickly inspect the eggs, almost 50% of the eggs should be black. So, take out unfertilized eggs or eggs with weak and damaged sperm and do not disturb the arrangement of the eggs because there are hot and cold points in the device itself and if the embryo is restarted, it will cause the embryo to die. Check the air intake of the device with a lighter. The flame of the lighter should be sucked into the device from a distance of approximately 5 cm. With these tips, I got the largest and healthiest hatch in Isfahan without air conditioning or even hatching, even though the eggs were sent to me by bus from Tehran. Of course, I kept the eggs upside down for 12 hours to put them in the machine. Good luck dear friend
