try again more clear

[abhaya]

I have a 4.5x4.5 coop for silkies only how many do I need for them to stay warm and be comfortable in winter temp drops to single didgets occasionally The other chickens have thier own coop 10x10 for the big girls

 

[patman75]

They wll be fine with the temps that you see as long as you have good ventilation.

4.5X4.5= 20.25 sq ft /4 sq ft per bird = 5 birds will be comfortable in you coop. Since they are silkies and smaller you can maybe jam another one in there if you have a good run or them. 10 sqft per bird in the run.