It was born in 15 days of incubation. It was runing, drinking and geting water normaly. on 3 day, in the morning his head bend, and try to eat under him. on afternon it lays down, with respiratory dificult and at ninght it died. What disease kill him so fast? every day i changed water, food, and clean the cage. The cage had a 70w lamp for heat providing. i have cleaned all. and had new eggs on incubator. I want to prevent this for the new chicks that will born.