Well we still aren’t 100% certain about their genders... I’m an optimist, but after a week of trying to run my incubator and heat plates off my limited solar, with no clear candling results, I opened them up and saw no signs of fertility.
I'm not sure if it's typical for geese or my friend's gander is a slacker but out of 13 goose eggs she gave me only 5 were fertilized. I don't have any idea how she knows which is which either though. lol