I'm thinking out loud here. Out of shipped eggs, I usually am running 80-90% development rate (except on too rouigh handled boxes) at day 18. By day 21, the actual hatch rate drops to 50% or less. For example, right now I put in 8 eggs that were alive at day 18, and it's looking like only 2 are gonna hatch. One pipped in the wrong end, and the others never pipped at all. My last hatch, I put in 24 or so eggs at day 18 that were alive, and ended up with 14. I was assuming it had to do with humidty or something like that BUT..... skip to my own eggs from my hens. First hatch of my own eggs.... 8 buff orps, 3 EEs. 5 blrw went into hatcher at day 18. 7 buff orps, 3 ees, and 4 blrw hatched. So... 14 out of 16 hatched. My second hatch, I put 9 of my buff orps in on day 1, and 7 of them hatched. So this is throwing me off. My fully formed dead chick issue doesnt seem to apply with my own chicks. Sooooooo.....what could shipping have to do with chicks growing full term, and not hatching? Any ideas?