It really depends on how good a broody the hen is, and the reliability of your incubator and your experience incubating chicks.
When hens are broody they are not 'themselves'. Try taking her off the nest and putting her in a cage, somewhere she is isolated from the other hens and also where there is no nesting box. That always works well for my hens.
They either have a parasite or they have been fighting.
I have Silkie Chickens who are very broody, they are little bantam chickens that look like little cotton balls.
It is always preferable to use a broody hen. Hens don't care where the eggs came from, once they go broody, they will sit on a golf ball. You can put eggs from other birds under the hen. When a brood hen is unavailable then an artificial incubator is the next best thing. Incubators are available from all feed and grain supply stores and on-line for under $100.
No. A broody hen is a broody hen and will sit on golf balls once the urge to nest takes her. Hens do not instinctively know if the eggs they are brooding are fertile or not. Hens in a chicken coop without a rooster among the flock will still go broody.
Brood means to worry. It originally referred to the behaviour of hens sitting on hens to make them hatch. The behaviour of the hens at this time became "broody"--worried.
Some hens just aren't built for being broody. Although, if there is continuous disturbance, (ie. noise from the house, other hens trying to lay etc), then this would cause her to leave her clutch.
Broody hens do lay eggs. They actually lay one [1] egg every day or two.
Because it is a natural instinct for them to go broody
In my experience using Silkie Broody Hens, you do often get two sharing the brooding, and happily share the parenting. I've never had these hens kill chicks, quite the opposite, they are both very protective of them . Of course if you have a new batch of eggs you want to hatch move one broody hen on to them and she will sit. Hope this helps
well buff orpingtons make great brudy hens and mothers
I would say that 99% of them will go broody. They are right up their, if not better than gamefowl about going broody