I live in Tennessee and my chickens run around all day everyday regardless of temperature. They eat snow, chase stuff blowing in the wind and generally appear to be having a ball.
Unless you live where it regularly hits below -10 you really don't need to be concerned with temperature
I think you are doing the chickens a disservice offering them heat where they are at. You have them acclimated to a heat lamp and not to actual outside temperatures.
So what happens when the inevitable ice storm hits and you lose power for a few hours or maybe even a couple days?
Your chickens...
I open and close the door and let the chickens figure out what they want to do.
So far the only weather they seem concerned with is rain, they hide under the coop, or high winds, they stay in the coop.
Snow, bitter cold, they run around and have a blast.
Flocks dividing into sub flocks is completely normal, it can even happen with birds all raised together.
Everything else you mention seems pretty normal.
As long as violence and bullying isn't excessive I wouldn't worry
It's been below freezing many nights since my chicks have gone in the coop.
What matters more importantly is how many there are. I have 19, they have no problem keeping themselves warm.
Not to mention I hadn't been keeping them under a heat lamp after week one. They were in warmer weather...
Not knowing every detail about your situation is why I didn't tell you what to do. Instead I told you what worked for me.
My chickens don't give you much weight
I don't have any windows. I don't want to mess up my ventilation by screwing with smooth airflow and I just haven't decided if I want solid windows. Anyway they would be easy enough to add in later.
In order to encourage the birds to sleep on the roosts and not in your nest boxes the roosts...
What a cutie!
It looks a lot like a black Astralorp chick. What are it's parents?
Pictures of my Astralorps as chicks, I can't find a picture of the ones that had black chests like yours but three were some
Mrchicks is right but he forgot one thing, in addition to the 4 sq ft a bird you need one foot of roost space per bird.
If you have a large coop you can fudge these numbers some, yours isn't large, or if you free range and the birds are only ever confined at night you can increase your...
You don't have to be concerned until -20F. If you get prolonged periods of time where it's that cold and you don't have winter hardy breeds you may need to do some things.
Temperature is not your problem, wind/drafts and moisture are your potential problems. Moisture leads to frostbite and...
I have a big coop, 120 square feet, with roost bars on one side and big open space for the birds to hang out in.
I keep my food and water in the coop, sometimes they stay in the coop for a day or some of the morning depending on what is going on, so it has to be in there.
I have no run.
The...