New birds, trying it with a granddaughter, now I'm an eggahollic. Hatched 16 courtnix no problem, already trash a dozen bob eggs with a variety of about 100 incubating, only about half candling at all. I'm enjoying reading and trying to get it right. I would like to have about 10 breeding pairs of about 3 species. Are fertility rates much lower on purchased eggs in winter?