When we do get a broody Runner sometimes, she'll stop laying, then after the broody business is over, it takes several weeks and sometimes a molt before she'll start to lay again, and we might see a soft shell, itty bitty eggs, etc., before her system smoothes out. Make sure she's getting...
I use chopped straw over soil in the day pen, and the pen itself has a 2% slope so rain drains off nicely. The manure combines with the straw and I get a lovely, earthy compost.