Switching eggs in a first time broody

[MabelTheMuscovy]

Another question! My eggs have arrived.... never had this before but there is quite a significant difference in size despite them being from the same breed. A few a a good bit bigger than the hen's own eggs which she is sitting on at the moment. Will she still sit on them when I swap them even if they are bigger?
Thank you in advance!

 

[PirateGirl]

Another question! My eggs have arrived.... never had this before but there is quite a significant difference in size despite them being from the same breed. A few a a good bit bigger than the hen's own eggs which she is sitting on at the moment. Will she still sit on them when I swap them even if they are bigger?
Thank you in advance!

Yes. A hen determines to sit will keep sitting even with no eggs! I swapped chicken eggs (infertile) with much larger duck eggs under my broody with no drama. She was just happy to have eggs.