I have a Barred Rock hen that went broody the last few days of July. I did not have any fertile eggs because my Roo died a few months back. I bought some eggs and put them under her on the 5th of Aug. Of course this is one of our hottest months here in Texas. The day time temps have been between 100 and 106 with night time temps in high 80's to 90's. On Monday I think it was, the temp toped out at about 108. Day 21 was yesterday and none of the eggs have hatched and I know they were developping nicelly but, I fear the heat has killed them. So here is my question. How long will this hen sit on these eggs before giving up? I would like to get some chicks to slip under her, but I do not know anyone close that has chicks right now. What would y'all do?