How long do I need to keep the broody and her new chicks separate?

Is there a rooster involved?
They don't lay while broody .
If the eggs are fertile, I'd put a fence around the nest because of all the issues of a broody, chicks and other birds.
If the eggs are fertile put some kind of mark on the eggs that are under her so you can remove the volunteers that come from the other hens while she is out of the nest.

 

I'd leave her with the 8-10 eggs. I know they CAN cover more, but I think that's a good number, esp for a new momma. But if you want, yes you can add more eggs the next day or so.
They do quit laying when broody
She can have layer feed now, or the broiler if you have it, I don't think it matters much. Just access to it and clean water. You fenced around her, how big is the area? Does she have room to move around off the nest, maybe take a dust bath? If the area is fairly small, you'll need to clean up her poops, also. They usually only go once a day when brooding, and it's nasty.

Other than that, I'd just keep an eye on her. She'll be in that broody trance and in a few weeks---babies!!!

 

Quote:thats not good. how long has she been out if it's been only a couple of hours you may be able to save the eggs by putting them back under her and closing her off better. but other than that you might have to start over.

 

Quote:I'd say you're better off starting over anyway. I usually give any potential broodies a week or so on some eggs to prove to me they are serious (meanwhile I collect a batch of eggs or order some if I want something different). Once you are sure she wants to sit, put the eggs under her that you want hatched and mark your calendar (its easy to lose track of how long they've been incubating). I have actually built a special broody box in my layer coop that keeps the other hens out and the broody in (and her chicks once they hatch). I usually move the broody into this box at the end of that first "trial week" along with the eggs she has been sitting on. If she settles into her new nest with no trouble, the next evening I switch out the old eggs for the new ones and start counting. There is room enough in my box for dust bathing and food, water as well as for new chicks to run around for a few days without things being too crowded. Good Luck with your broody! I have had 9 so far this year - I hope I'm done for a while!