how cold is too cold for silkies?

[Wendy'sChicksRock]

My coop is draft free,somewhat insulated and I'm going to have a light on at night.my silkies are tiny and I'm worried about them.they are seperate from the others due to some feather plucking issues. Should I bring them inside for the winter? It can get pretty cold here ( 10 deg or less some nights even below 0 )

 

[lightfoot]

my silkies are doing good at 10-15 below zero f. but want to make huddle boxes with a heat tube just to be sure.

 

[AkTomboy]

They do fine in my -45f and colder temps just keep the coop draft and excess moisture free.