UPDATE - I believe I caught the culprit. But to be fair, I am going to let the girls out to roam today and see what happens.
So fair the 2 injured girls are still kicking (I really cant believe it as the one attacked last week only survived a day (she was cut open below the vent and had intestine coming out). BUT, I still haven't examined them yet as they hide in the back corner of the cage whenever I walk in the room.
Well what did you catch?!?! Maybe you said and I missed it.
I've read stories with pics of incredible wounds, worse than yours, that heal up on chickens....it's amazing!
Cleanliness and infection guarding is key, as you know.
Glad yours are on the mend.