Cast iron pot, with a few coals?

[Badchickenpun]

This is a dumb question... forgive me. If I placed a cast iron pot with a few hot coals in it with a lid, would, could, it help heat a coop in the most extreme weather? The lid would be almost impossible to knock off, but I wasn't sure if it would get hot enough to ignite anything through the cast iron? I would only be adding like two or three hot coal nuggets.
EDIT: Ok, yeah, ignore this. Once the coal got the temp of the pot hot enough, I would think it would ignite anything in contact, the only way this could work would be if it were hanging and the lid was clamped tight. Like a cast iron teapot... but that's taking a big unnecessary risk. It would need to hang somewhere the chickens could not bump... and chickens do the unpredictable all the time.

 

[raingarden]

The coals will soon smother and extinguish from lack of oxygen. But, if the cast iron pot is a dutch oven then you can turn the lid so it allows some air in.

 

[sniper338]

Chickens dont need heat. They need dry and out of the wind.