Our muscovie hen has set on her eggs. But I wonder?

[Cuttlefishherder]

We have a trio of magpies that are new to the whole nesting thing. They have a good sized clutch of eggs that they aren't setting on.

So I was thinking that since our scovie will take 35 days, if I throw in some magpie eggs at the right time(about 5 days from now), they should all hatch about the same time right?

 

[calgal98]

sounds right, but the hen will have to cooperate by agreeing to set!! They don't always decide to brood the nest