Sores on back end

[Countryman101]

Lastnight I found my hen with blood on her back end. Looks like the skin was torn under the vent tords the right and left. I'm not sure what happened. I was wondering if you might be able to help me with any idea. I did attach some picture. as long as I have had chickens I have never had this happen. Thank you in advance.

 

[Countryman101]

Lastnight I found my hen with blood on her back end. Looks like the skin was torn under the vent tords the right and left. I'm not sure what happened. I was wondering if you might be able to help me with any idea. I did attach some picture. as long as I have had chickens I have never had this happen. Thank you in advance.

Won't allow me to attach pictures