I like the suggested method of using some size container inside the coop at night to get the chicks as well as the adult chicken population used to one another. Something like a dog crate. Anyway it would be an enclosure just for use just at night when I would put the six or seven week old pullets into the coop. They would be small at 6 weeks but in as much as it's an enclosure just for sleeping and not for long-term stay, what sort of dimensions would I need for four six week pullets? I assume we're not talking the two or three square feet per chicken rule with this special night time only enclosure, right? I also assume this process wouldn't last very long anyway.