Sick Chicken Covered in sores

[sunnyschickens]

Hi…chicken has been lethargic for days, I found these sores on her back half and the base of her tail. She won't walk but she is eating and drinking heartily when we put the water and feed close to her. She is almost 12 weeks old. I thought at first maybe a heavy molt, but these sores look bad and are warm to the touch. She is not crying but must be in pain. All other chickens are fine. We separated her and put a little hydrogen peroxide on the sores. The chickens are fed dumor.
I would like to know:
1. What the heck it is
2. How to treat it
3. If it could spread to other chickens, rabbits, and goats.
THANK YOU SO MUCH IN ADVANCE

 

[Eggcessive]

Do you know what attacked her? Was it a predator such as hawk, a dog, or raccoon, or was she pecked by the other chickens? If flies are out there, I would also worry about flystrike and maggots in the wound. Do you see anything moving? They look pretty serious, and she may take a few weeks to get over this. I would spray her wounds with Hibiclens and water, and dry. Then apply plain Neosporin/triple antibiotic ointment to the wounds twice daily after cleaning them. A wire dog crate with food and water, in the coop, is where I would keep her. A basket would also work inside your house or garage. But keeping her in with the other chickens might be more comfortable for her as well as keeping her part of the flock. Chicken slings may help to get them up off the ground and in front of food and water for part of the day. Chicken sling examples:
https://www.backyardchickens.com/threads/versions-of-chick-chairs-please.1166308/

 

[sunnyschickens]

Do you know what attacked her? Was it a predator such as hawk, a dog, or raccoon, or was she pecked by the other chickens? If flies are out there, I would also worry about flystrike and maggots in the wound. Do you see anything moving? They look pretty serious, and she may take a few weeks to get over this. I would spray her wounds with Hibiclens and water, and dry. Then apply plain Neosporin/triple antibiotic ointment to the wounds twice daily after cleaning them. A wire dog crate with food and water, in the coop, is where I would keep her. A basket would also work inside your house or garage. But keeping her in with the other chickens might be more comfortable for her as well as keeping her part of the flock. Chicken slings may help to get them up off the ground and in front of food and water for part of the day. Chicken sling examples:
https://www.backyardchickens.com/threads/versions-of-chick-chairs-please.1166308/

She was not attacked. She and her flock are kept in a clean coop with access to a run and all is enclosed and safe (learned the hard way)