It all started when our lovely little rooster was killed by a red tail. This was the first chicken we lost to a predator, and we were distraught. So we decided to be a little crazy, and collected eggs (he only mated with one of four hens) from our red hen. We collected the eggs she laid up to five days after he was killed. We built a styrofoam incubator, simple. Cooler with glass top, 25 watt light bulb surrounded by wire, dish with sponges and an accu-rite thermometer/humidity detector. After a few days of experimentation we felt we had the incubator at the right time, it fluctuated between 99 and 100. We put the eggs in, and i feel like it's been disaster ever since. The temp as gone as high as 104, but I'm not sure how long. We do get up and check them 2x through out the night and regulate temperature by a blanket over the incubator that we pull back /put on if things get hot or cold. At day 7 I canceled and I saw an eye/ veins in two of the 5 eggs. The other three have a dark shadow on top. Last night, day 9, the light bulb went out and temps dropped to 90. We caught it within an hour, tried to correct the temp, and it went up to 104, after two hours, we balanced back down to 99 100. I canceled and I still see what looks like a moving embrio in two, the other three still show a dark shadow. Do we stand a chance of hatching these with such temperature changes? On average they go up to 102 and drop to 97 through out the day.