Brooding In Warm Weather Ala TJ

TJ knew how uncomfortable staying indoors are these days, for the caretaker and his Sunshine chicks. He decided to brood outdoors, in the very same ranging pen. He set up the infrared brooding bulbs, just a few and have planned fallback positions of the Sunshines needed more heat. The photo shows the bulbs are positioned too high and he had been advised.

He set up the metal sheet around the brooding space. What does the metal sheet do? Partition? Wall? More importantly, it secures the chicks from predators like rats, as they can't climb the slippery surface.