Oldest eggs you've hatched?

[Nabiki]

Specifically quail, but really. Any eggs In general. May be a useful resource for others.

The general rule of thumb is up to a week is optimum. After that, there isn't a set in stone cutoff, but the viability of the eggs begin to drop after a week. After two weeks, you may still get some to hatch, but not many. After two weeks you will be very lucky if any develop.

 

[Wandering_r0gue]

So, verdict is in for THIS hatch: only one of my marked eggs hatched... but overall, it was a less than Stellar hatch... only 13 out of 30 hatched. Not sure what, if anything went wrong. The hatches were really slow and drawn out over 4 days, no large number at any one time. Will have to analyze for next time.