I had to move my 9 hens from the smaller brooder to a pair of wardrobe boxes joined together (from my move).  Subsequent pen was the size of the double bed I put the box on, of course with everything covered with plastic for the dust.. They were raised with an electric hen (no lights) and thrived.  That seemed to make them comfortable. They
were very quiet and content all of the time with two branch perches at different heights.
 
We had some cold weather here in VA at the end of winter, so I kept them in the guest bedroom until they were 8 weeks old and then transferred them to a large chicken house (12ft X 12ft) deeply bedded, and kept them locked in there for two weeks while I strung the hawk nets over the 1000 sq. foot fenced area for them.  Each evening at dusk, I brought them some scratch grains and sprinkled in bedding, so I could teach them to come in the house if the weather was going to be really bad.  I rattle the grain tin and they all come running.  That way, if we have tornado watches, or whatever, I can get them inside the house by rattling the grain tin ( even before dark).  They have feed and water in the house because it is rodent proof.  
 
After two weeks locked in the house, they were turned out on the large pasture covered with hawk net.  That was no easy task with the net, but I have 26 acres in a remote area and lots and lots of predators.  The day before I finished attaching and tightening the net, we had a possum who came in the pen and got stuck in the loose net.  We played hell freeing him, but finally got him back in the woods.  I promise he will not be back.  I have fox, coyote, and mountain lion.  The pasture is double fenced and top is electric.  If it doesn't keep the snakes, etc, out, I am going to add electronet.  Wild kingdom here, but this farm is so beautiful I am convinced that God either lives here or next door!!
 
So far, hens are fine all day on hawk-netted pasture and put themselves to bed at dusk.  I go out and give them scratch grains, in the bedding, just before dark; fresh water; and make sure the fans are on the right speed.  Then I lock them in the sturdy house for the night.  I put a beach umbrella in the middle of the netted pasture, a chair for me to read while I sit with them,  a kiddie pool with some water in it as I read they like to stand in cool water when it gets really hot and a dust bath in a galvanized tub.  Better known as Cluckingham Beach.
 
All is well.  Looking forward to their first eggs!!