I've read that there's a lethal gene when breeding Japs. The short legged gene? Well I put 6 eggs in the incubator.. I'm wondering if all will hatch or some will die in the shell? I asked this question on a chicken group, 2 users said they never had any problems with hatching, like none dying in the shell. Is this lethal gene death rate rare? I'm kinda new to Japanese bantams. Even though I'm a mutt enthusiast I'm probably gonna work on my Japs. Right now I only have a pair, a black tailed buff hen and a black tailed white..? Does the buff ever mix with white? I've had the roo since he was a chick and he hasn't seen that much sunlight, not enough to make the yellow staining.