yes
A hen who wants nothing more out of life than to set on her (or other hens) eggs is called a "broody hen," and the behavior is called, being "broody".
sit on the eggs
not sure about all hens but my hen bonnie will sit even if bert the rooster is around she does not seem to mind
every second of the day but she occasionally uses the restroom on the eggs to keep them warm for a while
The hen is likely broody, which means she is trying to hatch her eggs. She will sit on the nest to keep the eggs warm and may squawk to protect them. It is a natural behavior for hens to be protective of their eggs and offspring.
They sit on them as soon as the egg is laid. They will continue sitting on the eggs until they hatch. This keeps the eggs warm. If you gather the eggs every day, the hens are less apt to sit on them. Sometimes their maternal instincts kick in and they will sit on the eggs. When that happens you can just reach underneath and pull the eggs out. They may peck at your hand, but it doesn't hurt.
They sit in the hen house on eggs, on the roost or in a nest.
They would be drawn to there father when born.
12
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.
A Hen needs to be mated before sitting on a clutch of eggs..
No. The guinea hen does not have to sit on the eggs. You should put them in an incubator.