My inner Grinch is laughing right now.Can you imagine the package of rotting eggs being delivered to the wrong address?
Poor Unfortunate Recipient: "Oh boy! Someone sent me a Christmas present!" and after opening it........ "Ugh! However did I end up on the naughty list?!"

On another note, I think that the mystery egg is from the Lav orp. Her comb was always just like the Blue Laced's comb. Now it is much darker in comparison. I didn't check her vent. She is not exactly fond of being held by me. My wife has much better luck holding the Orps.