My best egg hatches are eggs I get at local farms (buying directly from the farm, or from as store, as long as I know the eggs are local.) If I order eggs, I have better hatch rate of course with eggs close to home. I have also done a combination of shipped eggs and local eggs, incase of a small hatch. I also have an incubator going- usually my shipped eggs go in that, and I give a few local eggs to a hen (no more than 9). Then at night she may get any and all hatched chicks.