If you read up on hatching shipped eggs here and elsewhere it all says to let them " rest " for a day or two to let them settle but I am finding that going straight to incubator or hen is yielding much better hatch rates. Now this is summertime shipping only didn't pay attention in the fall or spring. And of course along with good packaging. Also convinced that writing " hatching eggs " brings unwanted attention also. But ima keep doing what I'm doing cause whatever it is is working very well. I know I'm going against the grain but I say go straight to bat or or hen when u get your eggs whatever the time of year