Just trying to get a rough estimate here. My silkie hen has been broody for almost 3 weeks now. I tried to hatch some of our own eggs, but none ended up being fertile for some odd reason. So, I ordered hatching eggs and will give her half and hatch half on my own - just in case. I am of course worried that she will give up soon since we are already almost 3 weeks into this ordeal. What is your opinion on this? What's the longest your broodys have sat on the nest?