You will get opinions from more experienced people, I hope, but here's my two cents. I had four chicks and a bantam broody last year in a crate about that size, maybe a bit smaller (80 cm x 60), in the coop's run. Be aware that the chicks make an awful mess with food and water (think poop in it) so you will need to clean more than once a day. It's best if you can access food and water easily.Not to worry. I bought chick starter yesterday.
A new question though. The crate set-up I have right now isn't great for a number of reasons. I have this:View attachment 3576674
I've put 1" netting at the bottom to keep the chicks in. It's about 2' x 4'. I plan on putting a plywood piece on top, secured so it can't fall in, of course, and using it for mom and chicks in the coop. I don't know if she'll still need "privacy" but I had the box the right size. I thought I'd put the original nest in it so babies and mom feel "at home". It has a gate so I can put food and water.
How do you think this will do for a few weeks? I was thinking after 3 weeks or so, I could turn the box around and put chick-sized door, so babies have a place to hide if they're being picked on.
Do you intend to not let them out at all ? Mine were out after five days. I think after ten, the crate would definitely have been too small. When they were three weeks their broody brought them to roost in the main coop, in one of the higher nest. So no, I don't think you will be able to keep them only in this space for three weeks - they grow fast !
It depends on the broody. But once they're out, they're out for the day - they won't come back before sleep time (which in the beginning is earlier than for the adults).
I also had a "box" shown on the picture and they loved it, they all nested under it. If heat is an issue however I would make yours more open / ventilated, because it will get hot under there.
If they are not on medicated feed you can try to put a bit of soil in a small plate, it's supposed to help build immunity for when they will come out.
This year our chicks were in a small coop about twice the size and the broody still took them out after a week. The difference was, she used it as a place to bring them in to rest during the day or when it was raining. After two weeks though she took everyone to the main coop
