Update: They are still being crazy but I've figured some things out. Made a big kerfluffle at 1 a.m. and again at 3 a.m. I have ascertained that one of them, Six of Six (name), a Swedish Blue, is the focal point. She had a bit of blood on her wing yesterday, and has new feathers coming in - I assume that a pin feather broke. While she has washed the blood off in the wading pool, the others are nipping at that area. She is on the offensive I think because she feels vulnerable, so it looks like she's the one initiating most of the fighting. While they are all acting aggressive and agitated, when I separate her and her bonded sister out, everyone calms down. I guess they will be sleeping in a dog crate tonight to see if that helps everyone be calm through the night.