If you have other boxes available for the other birds, why not leave the eggs............once she is done laying her clutch she will begin to set. They will do a much better job than using an incubator and they are excellent mothers.
Mags, when I saw that you posted...I thought you were gonna pm me again....I was like...Oh, I am gonna be in trouble...LOL Yeah, I have an incubator...hubby built me one last August...it is finally off...(first time since) I am about to get it up and running again....LOL I'm just let her go and set on them....Can't wait to see lil ducklings running around...