How cold is too cold for a single hen?

[Gizabelle]

I know this question has been asked and answered a million times, but I've only ever seen answers in regard to a whole flock.
We have a sole Marek's survivor that I usually bring inside during the coldest nights of the year. But exactly how cold is too cold without having buddies to share body heat?
She's a 4yr/old orpington, just finished a molt and looking nice and poofy. I will say though, I feel like she's aging faster after Marek's so I prefer to baby her when at all justifiable.
Thanks for any guidance!

 

[GodLovesU]

How cold does it usually get in your area? As I understand it, Buff Orpingtons are pretty cold-hardy. Is your coop insulated?

 

[Gizabelle]

I'm in north Florida, so my coop is far better suited to heat & humidity. It's 9'x5' plywood + siding, but no other insulation, with one side open/HWC. The open side does not face the wind, but I put up an additional wind block (just in case) of plywood or plastic to cover about a 3rd of HWC wall just at roost height.
We usually get down into the 20s (or sometimes lower) only a couple of times a year. Its forecast to dip into the low 30s for the next few nights.

 

[ChikaInu]

I'm in north Florida, so my coop is far better suited to heat & humidity. It's 9'x5' plywood + siding, but no other insulation, with one side open/HWC. The open side does not face the wind, but I put up an additional wind block (just in case) of plywood or plastic to cover about a 3rd of HWC wall just at roost height.
We usually get down into the 20s (or sometimes lower) only a couple of times a year. Its forecast to dip into the low 30s for the next few nights.

Barely below freezing, she will be fine... but I'd honestly bring her in just for company until I could get her a friend.

 

[GodLovesU]

Aren’t marek’s survivors supposed to be kept away from other chickens?

 

[Gizabelle]

Barely below freezing, she will be fine... but I'd honestly bring her in just for company until I could get her a friend.

Sounds good. Last winter I brought her in when it got down to the 20s. Just making sure I'm doing what's best for her.
As far as friends, she'll be a carrier for life (and our property contaminated for 7 or more years) so our only option is to bring in vaccinated chicks and see how it goes. We are building a new barn/coop for that purpose, but until then she hangs out with our two mini pigs and gets spoiled rotten by my son.

 

[JacinLarkwell]

Aren’t marek’s survivors supposed to be kept away from other chickens?

Yes and no. They'll give the virus to every bird they or their danger have contact with, but the ground will forever be contaminated, so if you are ever getting more chickens, they'll get it too, no matter how long

 

[Gizabelle]

Yes and no. They'll give the virus to every bird they or their danger have contact with, but the ground will forever be contaminated, so if you are ever getting more chickens, they'll get it too, no matter how long

Yeah, we've taken our time in deciding if we want to keep going with chickens, and to see if she would make it a year, and then another, and so on... Marek's is really heartbreaking.
But dear Grady gets treated like the survivor princess she is.