I went through the same thing with mine. (Cochin Bantam) First broody hatch for me. I gave her eggs and left her in the coop.
Advice from my experience:
- Other chickens will peck at her comb.
- Mark your eggs, otherwise your other layers will use her nest to lay in.. which will leave you unsure which egg has been their days, and which is fresh
- You will likely have other hens go broody, which will result in low egg supply for a while. (I had 11 hens, 5 went broody) I averaged 2-3 eggs per day for a little over a month
- I did not take everyone's advice and leave mine in the coop for mom to raise. They were on the second row of nesting boxes and I feared for the chicks falling. I was worried that by putting a cage on the floor, the larger hens or rooster would kill the chicks if possible (if not snakes, ect. I removed them and they went to brooder. (No deaths) I had already lost 1, possibly 2 from the chicks/eggs being stepped on from hens fighting over the nest.
Otherwise it was fun. I have one broody Maran who I let hatch a few eggs from the Bantam's start (I spread them out between the broody girls) . She has decided the few she hatched wasn't enough and went broody again two weeks after the last hatch. I ordered some hatching eggs and collected a few of our own and gave in again a week ago.
Good luck!