Ok so this is just my experience and I would love others opinions. With shipped eggs I have found that whenever I hatch expensive purebred eggs I get a 60%-70% hatch rate and then many die a few days later. When I hatch cheap mixed breed eggs I get great hatch rates at about 95%. I use the same incubator, the same settings, and the same amount of time for the eggs to rest. I have even bought pure and mixed eggs from the same seller at the same time so they were shipped together. This way I could make sure the shipping experience was the exact same for all the eggs and once again the purebred eggs had a low hatch rate and the mixed eggs did great. I have shipped eggs that I bought off Ebay and just had a 100% hatch rate, and these were shipped eggs. They were all mixed with a BCM roo over different hens. I would really love others thoughts on what might cause this and if you have had similar results? I also noticed that mixed breed dogs seem to have less health problems then a lot of purebreds. I'm guessing this has to do with more genetic diversity. Any ideas?