How much space for two broody's?

[cestial225]

I am going to separate my two broody hens from the rest of the flock since I unfortunately lost three chicks this weekend. I think maybe another hen smooshed them when she layed in the next on top of them. So how much space do I need to section off for them since they need space to get out of the next, poop and eat?

 

[ChickenCanoe]

2 foot by about 4 or 5 feet including nest is really enough till she weans the chicks.