Surveyed the situation this morning - almost all the BC hens survived, and my good wheaten hen too. I had two Columbian Marans project pairs - everything right except egg color and type, one hen and one roo survived. Rescued a hen from the mouth of one of the dogs, got it sprayed with antiseptic - looks like it will be fine.
I've got things hobbled together until I decide what to do next. I'm inclined to rebuild, but it's almost december, and we have Michigan like weather out here... So it might be chicken shantytown until spring.