we have been trying to hatch some eggs. We have done 5 batches now, ranging from 3-15 eggs each, with no hatches from any of them. We know the eggs are fertile. We have cracked them open once we know they arent going to hatch & have found everything from no development at all, to a few days development, to about 15 days development & 1 that looked as though it should have hatched any time. We have used 2 different incubators, the first was a Little Giant, the second we borrowed from a friend & I dont know the brand but it is a commercial grade bator that regulates temp, has a humidity gauge & automatic egg turners. The eggs have come from 3 different sources & we have gotten the same types of development with all of them. Any ideas what we might be doing wrong????? We would very much like to get at least 1 hatcher .