My Silkie hen Big Mama has been sat on 7 eggs for over 21 days. She had one chick hatch successfully on the 14th but the other 6 eggs haven't hatched yet? I didn't want to interfere too much this time (last time, I brought her and her two eggs into my dining room under a lamp in a wire dog crate) so I decided to leave her in the coop. I had to put her and her eggs back in the dog crate (in the coop) because the other hens kept popping their eggs under her too (either that or Big Mama was going around collecting everyones eggs? Originally, she had two of her own eggs under her). I also have a heat lamp in the coop. I know the others layed their eggs on different days but how long should I leave her sitting on these eggs? Will she know if they aren't going to hatch and abandon them? Or will she just sit on them forever? I plan on leaving her with them for at least another week but I figure after that time has passed, the eggs aren't fertile?