We set a dozen eggs to hatch on Feburary 28. Wednesday had 2 chicks hatch Another One piped and then nothing Friday the 4th one pipped and we waited but nothing. After 12 hours we helped by making sure the membrane was moist and peeled some of the shell. today we opened the incubator and checked on the remaining 8 eggs, not pips, no wiggles. We did a water test and all floated, opened up on and it was fully developed, and there was some brown liquid in the eggs. Any suggestions what went wrong?