Temperatures way too cold to be healthy- what do I do?

[Fluffy_Moth_With_Silkies]

It's getting around 28° Fahrenheit here at night and I have 3 silkies. It's way too cold for them, but I don't know how to help that. I really don't want them to freeze up. I can give more info if needed.

Thanks!

 

[DobieLover]

Silkies that are fully feathered will have no trouble in those temperatures and lower provided they have a highly ventilated, predator proof coop to stay in at night.

 

[Fluffy_Moth_With_Silkies]

Silkies that are fully feathered will have no trouble in those temperatures and lower provided they have a highly ventilated, predator proof coop to stay in at night.

Two of them are fully feathered; one is a showgirl. They do have a highly ventilated coop to stay in at night, there's no way they could be attacked either. It's also getting below the 50s during the day.