Of course, the minute I make it a matter of public record that Mohawk wasn't pulling her own weight around the coop, she laid an egg yesterday!
Now, we know it was her because she laid it right in the middle of the run, rather than deposit it neatly in the nest box like Mathilda does (nearly) every day.
We rewarded the birds with a few blueberries and some scratch.
Today, Mohawk went into the nest box and sat there making the "here comes an egg!" noise for 20 minutes, but she left without laying an egg. I'm hoping it's just a case of her figuring out how things are done.