So it seems to me that trader joe's fertile hatching eggs have the best fertility. I have 2 dozen rock island fertile eggs from Lucky and guess what, none of them are fertile. For a comparison, I have half a dozen eggs from the farmers market that keeps roosters with the flock, 5 of the 6 are developing. I guess I will have to go back to trader joes for eggs next time. I actually had 5 hatch out of 7 that made it to lockdown.