I'd add a tarp to the smaller Run area and put up vapour barrier plastic on the sides. It actually gives off a green house effect on sunny days and holds in heat.View attachment 1915308 View attachment 1915309 View attachment 1915310 Ok 280 to 300 square foot of a totally closed room like a wooden shed with two windows is my inside coop roof walls etc then about 350 square foot that’s just wood slats and chicken wire roof and all with a door on it
Then beyond that door a 550 square foot yard with chicken wire walls up to 7 feet no roof
I have 29 chickens four ducks and a rooster