Today is day 29. One of the eggs I have left hasn't done anything visually for about 5-6 days now, now visible changes. It is all messed up anyway. It has a pretty detached membrane -- the whole thing would just slosh all around in their, veins and all. Since I believed it to be dead, I took it out and opened the top of the egg above the aire cell. Well, something is alive in there. I can see a large yolk sac and some movement, but I really couldn't discern what end I was looking at, best guess maybe back or shoulders. I can't imagine this would have lived even if I hadn't opened it up. However, I put some tape over the hole and put it back in. I didn't puncture the inner membrane with the blood vessels, just the outer membrane. Gross, and sad.