Can you describe all of her wounds, and post any close up pictures? The black dropping could be old blood. Do you have a dust bathing area where she might have eaten wood ash? That dropping looks like what eating wood ash would look like. But after 3 days, it may be old blood. Is she eating and drinking? What are you feeding? Is she alert and standing or walking? For wounds usually spraying with saline, a wound spray, or chlorhexidene is good, followed by plain antibiotic ointment twice a day to keep it moist.
The pic I posted of the deep wound was about as good of a pic as I could get on my own. She really doesn't want me messing with it and is very mad about the cleansing sessions. Im using banixx for chixx to treat the wound, i originally used dililuted peroxide to flush it in a panic even though i had that specifically for chickens.
There's a deep puncture wound which is in the image above that is about 2" long and 1" or so deep. That wound is right next to the little nub of her tail. It looks like it took layers of flesh above that puncture wound to the meat. So there's also about a palm sized wound she has covered with her remaining feathers well that isn't through the muscle. It's very bruised around that one now which is closer to the end of her wing on her back.
My concern is that her poops have looked like this consistently since the attack on the 29th.
I did feed her fresh blueberries after documenting the poop I posted so I at least expect that one to be a bit darker than usual.
I am using the flock 911 for her drink along with regular filtered water. I feed her Purina layer feed, and lots of snacks like the trail mix for chickens, the dried bugs. I've been using herbs like rosemary, basil, and marjoram to manage her pain and boost her immune system because sadly I can not afford the vet care at the moment, because the only vet willing to see her is over an hour away and wants about $500 just to see her. No one responsible for the dog will help my pet.
Sorry this is a bit long just trying to give as much detail as I can think of. I'm very new to chicken keeping and have had 0 wild animal attacks so far, but I have had a pit bull and now Rottweiler attack.

I.forgot to add she is still moving around I caught her politely pooping in the toilet last night so she's still jumping and all lol
Maybe this one is a little clearer.