She is brooding or incubating the egg. This means she is using her own body temperature and humidity to develop the embryo inside the egg. This development takes 21 days and after hatch the broody hen will protect the little chicks until they are old enough to join the flock.
Birds sit on eggs to warm them up.
The warmth allows the chicks inside the egg to develop properly, this is called incubation. Much like baking a cake in an oven.
If the eggs are too cold then the chicks inside them will either be underdeveloped or could die.
Potentially yes, however that possible chicken can never be formed unless the hen and a rooster get together and mate. The egg must be fertilized first. The majority of eggs are not fertilized as chickens used to produce for the mass market never see a rooster. On my farm almost all egg are fertile, but I collect them daily, refrigerate them and they do not get a chance to develop an embryo unless I put them in an incubator or allow a broody hen to sit on them.
If the hen has eggs, she is trying to protect them.
It depends, if a chicken if Broody and the egg is not fertilized, it will continuasly sit of it. if it is fertelized, i estimate (not sure, dont blame me if this doesnt happen) about 2 weeks, maybe 3.
Chickens will sit on a ceramic egg. They have no way to tell that the egg is bad. See link below for this definition: Nest egg The allusion is to putting a real or china egg into a hen's nest to encourage her to lay. The connection between this and the 'savings' meaning isn't exactly clear. It may be that the idea was that the egg that was put into the nest could be later retrieved, after the hen had laid.
A duck will sometimes sit on unfertilized eggs. Usually, after a while the duck will come to realize that the eggs are not going to hatch and she will give up and move on.
yes
No. The rooster has relations with the hen and she lays fertilized eggs
The broody hen does not know that her eggs are fertilized. Broody hens will sit on an unfertilized egg for months if allowed. They will even sit on golf balls. Most farms remove any eggs that have not hatched after 30 days if the hen insists on remaining on the eggs.
Yes, the hen is careful not to squash the chicks. Hens sit on the clutch of eggs for three weeks without crushing them. Once the chicks start to hatch the hen is extra careful and often gets adjusts her position. The hatching chicks will stay under the mother hen for a few days and even when they venture out, they will dive back under her for protection.
Potentially yes, however that possible chicken can never be formed unless the hen and a rooster get together and mate. The egg must be fertilized first. The majority of eggs are not fertilized as chickens used to produce for the mass market never see a rooster. On my farm almost all egg are fertile, but I collect them daily, refrigerate them and they do not get a chance to develop an embryo unless I put them in an incubator or allow a broody hen to sit on them.
Sometimes, she will usually wait to sit when there are many eggs.
sit on the eggs
If the egg is fertilised a hen can sit on it for 21 days and hatch it into a chick. Or you can incubate it but if the hen sits on it for a few days then gets off and stays off then throw it away and don't eat it because there will probably be a chick developing inside and i really think you don't want to eat that. It's still ok if the hen gets off for food and water but it has to come back on fairly soon or the egg won't hatch. If you get the egg even before a hen can sit on it then it is ok to eat. It's probably still good if you collect eggs once or twice daily.
A hen will go "broody" at anytime during her egg laying years. Not all hen do and some breeds are just naturally brooders. To ensure at least one brood hen in the flock you might consider getting a Cochin or a Silkie hen as these two breeds are good brooders. There is no way to force a hen to sit on eggs.
Just like a human, the Hen will have maternal instinct. In other words, it is in her blood and DNA to know what to do. Some Hens do not get attachments to their eggs at all and will just leave but it is very rare.
You need to start with a fertilized fresh egg. An incubator, thermometer and hydrometer would also be handy. You also need to be able to devote at least 21 days to the care of the hatching eggs. A live broody hen would do all this for you.
If the hen has eggs, she is trying to protect them.