Should I have one?
if so how high?
what shape and size? ( dia. and length per bird)?
should I have a roost in the brooder box?
I'm going to put one in, as I think it gets them used to the roost. I got some teenagers from my sister and they had never been exposed to a roost. They kept trying to sleep in my nest boxes and had thoroughly soiled my nests! I had to pull up my nest box roosts each night just to keep them out. They finally learned to roost after that, but I'm going to start my babies out now and adjust the roost up as they grow.
Different size dowel rods should be appropriate and can be changed out as they go. Most folks on here advocate a flat roost, but my chickens like a round roost for better grasping.
I always put one in the brooder box about 3 to 4 inches off the ground and then move it up as they get older.
I use an old broom handle or branch from a tree but you could use pretty much anything that isn't too narrow.
Progressive Pics Cheat Sheet
I just put a little furring strip in there with them and they love it. Started using it at 2 weeks.
Have had chickens for a whole six years now! This year decided to try out ducks too! WOW messy they are, but totally worth it, their cuteness overpowers all the messes they can make :D Check them out at: autumnbreezechickens.blogspot.com