Candle your eggs.
Candle ALL of your eggs.
I didn't candle the runner duck eggs. The suspicious looking one that I was going to candle tonight blew up before I could. The smell is not insignificant, but I've had three babies -- I am comfortable with my ability to handle the smell. It's the bacteria load that's been put on the remaining (hopefully) still-viable eggs that's got me chewing fingernails up to my elbow.
St. Vidicon, meet St. Francis. You think you guys can work together on this one?