[Dizzycow]

One of my Cream Legbars lays massive double yolkers regularly, and I'm about to give eggs to someone who wants to incubate them. What happens if you incubate a double yolker? 

[bigchicken]

As far as I know it has never been known for a double yoker to hatch.  I think it is lmpossible.

[Dizzycow]

WHAATT? No twins??! Pants. Ok, well, that's breakfast sorted! Thanks. 

[bigchicken]

There have been claims that some people have hatched double yokers. I have several reasons why I don't believe there claims  Not enough room for two chicks to fully develop in the shell,  Not enough air for two chicks to breath are just a few. 

[bigchicken]

On further investigation there has been scientific research and it seems to be possible but is extremely rare.

[Dizzycow]

Thanks, Bigchicken. I won't take the risk, although I must admit I'm tempted by the challenge!

[Rich/Jan]

Unbeknown to us we had a double yolker in the incubator amd we did in fact hatch twins - but they didnt survive beyond a few minutes.  At the time we were hatching hundreds of eggs so not just a few.  I cant remember the breed ? Ixworth, White Sussex?  Expect OH can remember.  We were silly not to have taken a photograph to disprove the sceptics who dont believe it is possible.  Never done it since though and wouldn't intentionally try to but you cant always tell from the size of the egg.

[Sylvia]

I have tried hatching a double yolker (Khaki Campbell) and while the egg was fertile the ducklings didn't develop after day 14. I won't try again as I had nightmares about conjoined ducklings and my responsibility towards them

[Dizzycow]

Definitely won't be taking the risk having read these posts! Thanks, guys.

[demonfarmer2630]

a dubble yoker will hatch just the same as a normal egg there will be to chicks but there is usualy a deformed or small chick

[Big Light]

I have tried on numerous occasions over the years but nothing viable comes out, better to enjoy the double yolk  on bacon and mushrooms