If I replace the nest boxes....

[gritsar]

My girls are outgrowing their original nest boxes. I already have the new ones I plan to use. They'll be twice as big.
My girls are pretty attached to their boxes. Do you think changing them out is going to set the girls off of laying for a few days?

 

[Opa]

It might affect things for a day or two. Try to place the new boxes at the same height as the old ones. That will help them adapt better.