I have yet to have an egg blow up.. they start stinking usually.I don't want a blow up.
Eh.. shipped eggs... possibly later development. I have had good luck shipping eggs within my state hatch rate, but terrible hatching shipped from afar... 3 hatched out of 36 eggs and all were boys with minor SOP mark downs. Hope yours is better results!I agree, These are shipped eggs with makes me even more nervous.

The only rule I know of that hasn't been disproved is roosters don't lay eggs... everything else is a guideline!Does it count if I didn't know this rule existed? LOL
