I have read loads and loads of topics and i still just have to ask so i am sorry.. I have set the eggs at day 0 and now i am on day 4 I have had a temperature spike at 125 being the highest due to thermostat failure and usb fan shut off on my diy incubator wasnt happy. How do i know if i killed them?? as far as i see all have egg sacs should they be at top? as i have a tilt system eggs upright etc some i couldnt tell which end was the point lol So i candled today i have one egg with a definate black mass in when i turn egg it all turns i think this is bad another egg with 2 black dots one on each side there are a few porous hard to see few clear cant see a thing and there so many with a shadow at the top when i turn the egg the shadow rotates is this infertile i thought possibly this is a ifertile yolk I see no veins but my light isnt brilliant i cant do pics but ill try to put some in my photobucket album please see my profile page. ill add a link asap my eggs are all mixed lots i brought 4 lots of 12. so had a selection. all silkies and 1 polish. i have ordered a new thermostat a 12v halogen light supply and 4 new thermometers lol and a set of fans for incoming air. hoping with a bit of wiring i will get rid of my errors for my second try.... GUTTED... Let me know what you think?