? on 72 hour heat packs

[Azriel]

I have read that the 72 hour heat pack hold the temp at 100 for the 72 hours, so, won't that start the eggs developing while in transit?

 

[tec27]

Who's shipping eggs with a heat pack?

 

[Sphinx]

Yes, I've heard of using heat packs with CHICKS, but never with chickens. I think eggs would be much better off cold, so they don't start developing.