Hi Everyone! I am just wondering if different breeds develop at different rates in the incubator? We have silver laced wyandottes and black australorps in there at the moment. I candled at day 7 and the slw were completely iridescent, showing no signs of development. At that same time, the australorps were definately showing the air sac and veins. It made me think the slw were not fertile. However, I candled again today and the slw are showing a sort of air sac, but it's not circular. It looks very different to the others. So I am wondering if they are just developing at a slower rate, or whether they might actually still be infertile, and just doing something strange! Thanks!