Hatching chicks using a hen

I have done this twice, each time I have learned to be patient and many other things.My last hatch was last year,with a 4 year old hen who legit broods once every year.She was a great mother.But,I think she may have incidentally stepped on the bantam mix and killed him


So this year we are pretty sure.of using.our favorite bantam named Little Bit to hatch.She legit is awlays broody.She sits,molts,has a week or 2 of laying then sits agin,this is literally a cycle that has went on since she begun layinh,maybe a year now.So we dont het too mnay eggs from her so why not use her for a purpose.She is friendly and obviously wants babies,so makes perfect broody.

I plan on letting her hatch our cochins eggs, possibly a few large eggs.My question is,how many eggs can a small hen like her hold?Can we use older eggs from a few days ago in the kitchen,or are they no longer good?Figured they would be bacuse everyone seems to bring home eggs and hatch them.I would definitely rather bigger hens eggs because they are with two roosters who continuously mate them,so chances are 95% of the eggs will be fertile.My last hatch had nearly all fertile eggs.I do excpect the cochin bantams to have fertile eggs but they just started laying,although the cockerel keeps them pretty well mated so we will see what happens


Can I possibly have her hatch with other hens?How do you get broodies to bond in such ways?She is so distance from our flock,dont know how that would play out.

Any other tips