A weasel is the most dangerous. He will be back. Chicken wire is too big and a weasel can get throught the wires 1 inch holes. So make sure there is no way for a small mouse like animal to get in.You need hardware cloth and close the coop door.
A puffed up hen means she does not feel well. Good luck
I bet they are in shock, I would be if I was almost killed and some of my flock mates did die. Clean up the wounds, you can flush them with half warm water and half peroxide solution. If they have wounds they should be separated from the others so they don't peck at the wounds. Chickens can...