Will eggs 2 weeks old still develope well? I was thinking of starting collecting next weekend but I cant decide whats a good day.
Fresh eggs have the best hatch rate and the older they are the percentages drop. So I would say hatchability would be something like this:
1-6 days excellent
6-10 very good to good
10-14 good to fair
14 and older---good luck

******If I am not right on any part of this please correct, as I am not an expert*******