Ducks may lay eggs.....I am not convinced, however, that they like to leave eggs. I have had 6 ducks in lockdown for a week!!! They are all still kicking. I have a sqeaky toy my roommate bought for the dog that I stole it to trick the hatchers into proving viability. They go nuts when I set it off. They just don't sem to have any interest in external pipping or hatching. Apparently it's nice and warm and cozy in there.