I candled my Japanese bantam eggs last night and all of then had a broken membrane; very disappointing. It got me to wondering on how hard of a jolt would it take to break the membrane, so this morning I took a dozen eggs of varying size, candled them to make sure they were intact, and tested them. Each egg I held in my hand and gradually shook the egg faster and faster. Shaking did not break any membranes no matter how fast the shaking was as long as there was no jolt. Then I tested jolts; soft, more and more until I jolted the egg as hard as I could using my hand. With each egg it took the hardest jolt to break the membrane. From this experiment I know that, for the membranes to break, our postal workers had to have thrown my eggs onto a pile; or some such.
Reasonable handling would not have broken the membranes and ruined the eggs. I do not think I, or my wife, will be ordering eggs through the mail. Is there a safer way to have them sent?
I still have more Japanese bantam eggs coming; I hope the postal workers are more careful. When they come I'm going to candle them immediately-no point in incubating addled eggs. Maybe next time...