I opened an egg this morning...partially. This was day 27 and I knew it was long past due but I left it in for the guinea hatch and finally took it out this morning. (Very risky, I know.) I went in through the air cell, but not through the membrane. There was no internal pip and there was obvious fluid sloshing around. Through the membrane it didn't look to be decomposing yet, but I didn't look too closely. Is the fluid indicative of drowning, or is that just normal fluid that they use to lubricate and turn and zip? 2 of the other 3 chicks had trouble hatching. One was too big, and the other had a bit of a rubbery membrane. The membrane on this one looked a little rubbery I guess, but it was also "overdue". Any clues, or luck of the draw? For what it's worth, they incubated in a Brinsea Eco 20 - 35% to day 18, then 65%.