My HAL chicks are in the barn getting to know the hens and rooster through the coop door. The whole inside wall is just 2x4s filled in with chicken wire and I don't have a safe outdoor area for the chicks yet so this was the next best thing. They have full run of the 30x40 pole barn. Half sand, 1/4 dirt, and 1/4 driveway gravel with straw on top. Using wooden saw horses as temp roosts while they are in there... I have a few questions though. They are 7 and 8 weeks old. How long would you keep them in there before adding them into the coop with the big ones? (U know to add then at night) and some still aren't roosting at night but I'm wondering if its because they didn't judge the daylight correctly.