Hi Sarah, if it is the pairs first time breeding, don't be too discouraged as a couple of my "first timers" have done the same thing.
You have 2 options, leave the eggs in the nest with the hen for a few more days, just to make sure, or dispose of the eggs and see if the parents go down again.
You could always open one egg first and see if there was anything, if nothing, open the rest.
There are a lot of factors why dud eggs. Like I mentioned above, first timers, inexperienced, male got to the hen too late, fertility problems, weather, so many reasons.
I have a hen who has constantly had dud eggs last 3 seasons. Gave her a proven male this time round to see what happens. She is "due" any day now, not that I am holding too much hope for her.
