Japanese bantam, how “cold hardy” are they?

[Chicken poppy]

Okay, so Japanese bantams aren’t very hardy. But working on coop insulation (not snowing yet, so scared how cold it will be when it does) And so far, it stays 6-10 degrees warmer in the coop then it is outside. Its been getting down to the 30’s and im wondering, how cold is to cold for them?

 

[JacinLarkwell]

My gal did okay. Couldn't keep the male's alive though

 

[Chicken poppy]

My gal did okay. Couldn't keep the male's alive though

Was this in 30 degree weather? Makes me nervous cause i have a boy who I absolutely love. Hopefully everyone stays warm this winter..

Sorry to hear about the passing of your boys.

 

[JacinLarkwell]

Was this in 30 degree weather? Makes me nervous cause i have a boy who I absolutely love. Hopefully everyone stays warm this winter..

Sorry to hear about the passing of your boys.

-20 and lower at night