We started with 16 eggs in our over 50 year old incubator. The incubator was, at first, very inconsistent with the temperature. After candling around day 13, 4 were not viable eggs and 12 were. All 12 eggs were progressing nicely. I candled on day 18, before "lockdown". 5 eggs had embryos that were really filling the space nicely and all 12 had great air sacs. Day 21 came and went as I expected it to, given the temperature had fluctuated for the first 7 days. On the beginning of day 24, our first chick hatched. The following day (ending if day 24 and beginning of 25), 4 more chicks hatched. Today, I opened 4 of the remaining 7 eggs. They were all fully developed chicks, however, the were deceased and had not "consumed " the entire yolk. Now I have 3 left. I water floated them today, now on day 26, and they all floated accordingly. I had a slightly low floater, but it is a larger egg. No movement, no sounds, nothing. The only thing I am holding onto, is the fact that one of the embryos has grown slightly since day 23. I need advice! I need personal experience! I don't want to lose this many.