i have eggs under a broody silkie. today should be hatch day, however i'm not expecting them to 100% hatch. it's been cold, she stayed off of them one night because she sat on someone else's eggs, etc. so, my question is, how many extra days should i wait? i was thinking three. i have chicks that i would like to stick with her regardless of these eggs hatching. so i don't want to wait too too long, but don't' want to jump the gun and then have her give up. thanks!