Ok so have a big barn like a 20x50 and my chickens roost and lay eggs. so up at the top of the barn In the rafters I have 3 bantam chickens that are setting on eggs. I am planning on buying a incubator that only holds about 3 eggs that is only about $17.40. If one of my two roosters fertilizes the eggs will they survive in the incubator and hatch out.?? Does the humidity have to be right for them 2 hatch out.?? Home to: 2 cats, a yellow lab puppy, and a boston terrier, 2 horses and LOT"$ OF CHICKEN$.