Ok.
My chicken seems like it wants to get broody, it has 4 eggs, but for some reason it sits a bit then leaves it. While it is sitting, if I come near it makes weird noise, and it's been plucking off some of its feathers. Sometimes I see that another chicken is sitting on the same eggs while the first chicken was away, it didn't make that sound but if I bring my hand near it it attacks it. The problem is I haven't built a home for the chickens yet (the old home got broken and abandoned long time ago), and so they sleep in the same place they lay eggs, and all of them lays eggs in the same exact place right now. So at night, it can't easily sit on them as everyone else wants to sleep there. I made another place for laying eggs (not a proper nesting box but a shade with some boxes under them), but they're not using it yet. I am not sure what exactly I should do, but I feel like I have to build the house already. I was thinking of buying some leghorn fertilized eggs if my chickens got broody for more than 48 hours.
As for the chicks: