i have 4 gals and a 4x4 coop attached to a secure run (so far no problems with predators
) so far I have left the coop door open (I’m not a morning person
) this way my gals don’t have to wait for me to get up to go out of the coop, they just have to wait to free range 
My coop has ventilation at the top of the coop.
I’m thinking I will need to start shutting the coop door to help keep warmth in at night any thought of what temps to start doing that? I was thinking anything below 32
It’s starting to get in the mid 20s at night I shut the door last night my hubby opened the coop door this morning and said they were waiting to get out despite the cold as though they did not realize how cold it is. Maybe I should tell them

Edit not sure if this helps but my chicken are:
Barbecue - Wyandotte cross
Blacky - Autsralorp
Princess Goldie - Gold Laced Cochin Bantam / Easter Egger
Chicky - Leghorn / Easter Egger



My coop has ventilation at the top of the coop.
I’m thinking I will need to start shutting the coop door to help keep warmth in at night any thought of what temps to start doing that? I was thinking anything below 32

It’s starting to get in the mid 20s at night I shut the door last night my hubby opened the coop door this morning and said they were waiting to get out despite the cold as though they did not realize how cold it is. Maybe I should tell them

Edit not sure if this helps but my chicken are:
Barbecue - Wyandotte cross
Blacky - Autsralorp
Princess Goldie - Gold Laced Cochin Bantam / Easter Egger
Chicky - Leghorn / Easter Egger