
That's what friends are for!
I haven't ever had to dispatch a little chick (before fully feathered out), but my personal method is to use a BB rifle.
I don't like having anything to do with roaches; I hate those little buggers!!!
Okay, I'll start that right away. =)
I use the dry incubation method. Most of my hatches have been 0; all my incubators have been homemade. DH is planning on getting me a real incubator soon. Also, I'm hoping to modify my little cooler-bator according to Meep's instructions. =D
Shipped eggs kind of get damaged in shipping; sometimes the "damage" is "repaired" by the growth hormones (I guess) of the chick, but sometimes the "damage" is too great. Also, fertility can be an issue unless you're getting the eggs from a reputable hatchery or from someone you know you can trust to give you fertile eggs. Orps are quite fluffy around the vent, kind of like Cochins but not as much; Cochin fluff decreases fertilization by 30% (for instance) and then shipping decreases hatch rates by 50%.
Did you crack one or two of the eggs to find out whether they were fertilized or not?
(I guess some, at least, must have been fertilized; you wouldn't have been incubating clears for 3 weeks.)
Sorry, I did it again...

I'll just