Due to loosing sleep over minor temp fluctuations, I bought a new nice incubator to replace my older model. I have been running the new one for a few days to get everything ready. In the mean time, temps were holding steady in the old incubator so I left the eggs in there. Everything was okay.....until last night... I went to bed around 11 and temp was fine. I woke up a few hours later, and it spiked to 108!!! I have eggs ranging from 4 days to 13 days in there. The older eggs are marans and ameraucanas so its hard to see in there anyhow. I will leave them alone for a few days, but my question is how can I tell if they are alive and viable? It's so dark in there anyhow. Will a blood ring for at 13+ days? How much movement should you see? All older eggs were definitely fertile as they were candled already. The New sets are just a barnyard mix a friend and I are testing, but the others are nice chicks! with these dark eggs its hard to tell anything, but the airsacs have been developing nicely and the black blob inside growing...... Help talk me through this !