I have a broody silkie sitting on 6 eggs right now. I live in Oregon which is normally not too cold but this weekend we're supposed to stay below freezing for quite a while. It's not something that I'm entirely used to. I have a 100w bulb out there right now that keeps the water from freezing but my question is do I need to have extra heat for my silkie and the eggs or will she generate enough heat on her own. She's in a little nesting box inside a little converted dog house. There are no drafts or anything like that. I'm just a little concerned and thought that some of you from the colder climates could give me some advice. Thanks