I have them in dog crates inside the house.Where exactly are you located? Climate has a lot to do with things. Is the turquoise coop in the pics your new coop? If at all possible, I would section off an area inside the coop for the littles. @azygous has a great article about integration. This is my integration/ broody/ isolation area https://www.backyardchickens.com/threads/change-of-plans.1454019/post-25352513
Where are all the littles right now?