I bought some eggs from a gal last year that had a low hatch rate. The birds were great, but the eggs were about 50% She lives close it was not in the shipping. The rest of the breeds did fine. It is in the flock of Blue Orphs. What can I do to up the fertility rate? I have culled out the old roosters and replaced them with younger birds. I assume this could have been the cause. Any other ideas? This is a really nice bunch of birds I would like to see them take off, but if you can't raise chicks.. what good are they?