No. The guinea hen does not have to sit on the eggs. You should put them in an incubator.
No, fertile hen eggs need to be incubated at the proper temperature and humidity levels to hatch successfully. Simply sitting in hay will not provide the ideal conditions for the eggs to develop and hatch.
Yes.
Depends on if you have a broody hen. If the hen is brooding then you do not need to incubate, if you have no natural brooder then yes, an incubator is needed.
It keeps the eggs warm so it will hatch if the egg is fertilized. Mostly you won't need it, only if your hen refuses to lay on the eggs.
no
A hen
They sit in the hen house on eggs, on the roost or in a nest.
If the hen turkey is nesting let her incubate the eggs. If you have a good broody chicken hen let the hen incubate the eggs.
Yes, not all eggs hatch even when a brood hen tends them. "Fake" eggs are available for use when a breeder needs a hen to hatch only a very few eggs. The hen will care for any egg in the nest when she broods.
Yes, only the hen sits on eggs.
Yes, you can cook guinea hen eggs. The result will probably be more rubbery in texture, however.
They don't. They lay eggs that hatch.