I bought a couple of new hens on Sunday and put them in a small quarantine pen together - all was fine. I had eggs and there was no trouble at all yesterday. I went to check on them today and one hen had this HUGE gaping hole in her neck. I have NO idea how to started - whether the other hen just went in on her, or whether a mouse got in and bit her and then the hens saw blood and pecked (I expect the other hen just pecked till there was blood and then just went into a frenzy). Anyhow, I've separated her, flushed the wound with a sterile saline solution and left her. She's eating and drinking and seems fine. However, as you can see, that's a HUGE hole...that, there, in the middle is actually the inside of her neck. What to do now? Should I snip back the feathers around the wound? I've some stuff saying it shouldn't be stitched or glued because the wound could be too old now. However, how on earth will that ever knit back together?!