If it has eggs in the nest.
They sit in the hen house on eggs, on the roost or in a nest.
The answer is "gums".
nest?
A broody hen is easy to spot. The hen will remain on the nest when the other hens are going about their daily routine. The hen will often be aggressive when you reach in to remove her eggs. If you remove the hen from her clutch of eggs she will often run right back to the nest, protesting loudly. The broody hen will not roost with the other birds but remain on the nest over night.
she\well\take\to\the\nest
The hen can take short periods off the nest and it will not hurt the brood. A period of over an hour or two may do damage to the brood.
Example sentence - She had to move the hen off the nest in order to pick up the eggs.
Farmers used to leave one egg in the hen's nest to encourage her to have more eggs.
Most often this is caused by another hen using the nest when others are ready to lay. If a hen cannot lay in a nest they will find a convenient place just about anywhere. You might also want to freshen the nesting material in the nest daily. Some hens will not lay where another hen has soiled.
no, If she did her eggs will get cold
In a nest, under the brooder hen.
A few things could be happening. You could have a broody hen, she has decided to hatch a clutch of eggs and is sitting on them. You may have a sick chicken, she may not feel well enough to participate in the activities normally done during the day. She may have an injury preventing her from getting up. You will need to do some investigating. A broody hen will protest any attempt to move her off the nest, she will strike out at a helping hand, if moved from the nest she will go right back. A sick hen may allow herself to be moved and stay right where you put her, not attempting to get up and move, but not protest the moving in any way.