That doesn't mean it is a miniature brooder...on the contrary, 200 heads were kept on the bed of an Elf truck :) How mobile can you get? Come 21days, they will be moved to the ranging area, the fishpond not to far away from where the truck had been parked.
See how happy and contented the chicks are. No pushing. No stampede, rushing to get heat nor fresh air. They were happily playing around.