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They should as long as they go broody. Some chickens never go broody. Also eggs that are shipped may have a lower hatching rate, sometimes. I have never have a chicken reject an egg once they are broody, their instinct takes over and they will accept any egg, pretty straight forward. When the time comes, if you are attempting to add eggs while she is in the nest. Add the eggs from behind the hen, some of the hens become very protective and if she tries to peck on you, she will not break the egg by accident.
What breed/s do you have now and what breed are you considering?
Your plan can work if you wait for a hen to go broody and immediately find eggs to buy. You could get the eggs under her within a week of her going broody so that can work.
Some breeds are much more likely to want to raise a family.
In order of tendency for broody habit - silkies, cochins, dorking, Java, Marans, Chantecler, Penedesenca, Brahma, Orpington, Araucana, Sussex.
Making the nest warm, dark and comfy with a few fake eggs in it will help encourage her.
The orp may go broody. Half the orps I had went broody, the others never did.
Aorps can go broody too but probably not more reliably than orps.