I plan to build a few brooder boxes..... right now my main brooder is full and it's way too cold to pitch those 4 week old babies outside......even with a heater..... now I just have to convince the hubby. He is currently under the impression that tubs are fine.... for now.
I use the big 50+ gallon Rubbermaid tubs (22”x42”) for the first week and then they go into 4’x6’ brooder boxes. Also have a few stock tanks I brood in as well. From there they go to grow out pens if I’m keeping them. Grow out pens are 6’x12’ inside with a 6’x24’ outside run. I keep them locked inside until they are big enough to go out in the run.