Has anyone ever candled goose eggs????

[Bec]

My goose is sitting on 7 eggs and I tried looking in them to see if any were growing...I can't see anything or maybe I just don't knwo what I am looking for. 3 of them were completly black...one had what looked like a yolk bobbing around in there and the others I could kind of see a yolk but it looked like maybe there was something else too?? She has been sitting on them for 9 days....is it too early to look??? Any suggestions??

 

[fowlweatherfriends]

Here's a video:

some more candling links:

http://animalscience.ucdavis.edu/Avian/pfs32.htm

http://www.extension.umn.edu/distribution/livestocksystems/DI0631.html

http://www.minkhollow.ca/HatchingProgram/Candling/Fresh/index.html

http://duck.meetup.com/1/boards/view/viewthread?thread=1933703

Never candled a goose-only chickens myself. Best wishes!