I don't think those temps are too extreme. I'm waiting on my first broody and we're at 23 days. She started with 12 eggs and is now setting on an unbelievable 26 EGGS. Her coop mates continued to lay in her nest box. I'm not sure what to do. If nothing tonight when I get home from work, I'll have to figure where to go from her. Perhaps candle and start up an incubator.