I will apologize in advance for the long post! I've acquired hatching eggs locally to get a couple of new breeds, and I suspect one of these breeders has some fertility issues. I've hatched other eggs from them with no problem, so this seems to be specific to only one of the breeds they raise (Bielefelders). I got 19 eggs the first time (I paid for 18 and they gave me one extra). Upon candling (I usually just wait until day 18), I had 9 that were clear. Of the 10 viable eggs, 8 hatched. That's 9/19 infertile. I let the breeder know. They were really great about it and gave me 18 replacement eggs. I was thrilled. Most people that sell hatching eggs can't guarantee fertility or anything else, and they shouldn't have to. We can't always control nature, as often as we try. They went above and beyond, and I certainly appreciate it. Upon candling the second batch, I had to pull 9 clears out of the incubator, along with 1 early quitter. That's 9/18 infertile. The 8 viable eggs are currently in lockdown. I noticed, while candling both batches of these eggs, that the clear eggs were all the same size and shape. They were NOT ABNORMAL, just specific. It was to the point where I would say "clear" before placing them over the light and my husband was nearly convinced that I might be a sorceress of some sort. I've noticed the size/shape connection to clear eggs before, but on a much smaller scale, so it could've easily been a fluke. I did crack open the eggs in question and found that they are definitely infertile. My inner scientist is very curious about these things! So, on to my questions: -Is egg shape specific to each hen (like a fingerprint)? I know many variables can effect size/shape but, under normal laying conditions and health, is this something you've noticed? -If these eggs were found to be from specific hens, is it likely that they just aren't being covered by the rooster? I don't think this particular breeder has an unreasonable number of hens with their rooster, but perhaps he's a bit lazy or has favorites? -Has anyone else had these issues with Bielefelders in particular? Are fertility or other hatching issues common with this breed? I know the gene pool is still quite small in the US when compared to other more common breeds. I've really enjoyed their disposition though, so I think they're worth a bit of hassle. Thanks!