I am curious how your hen with the injured neck has faired?
I also had a mink attack and kill several of my birds just a few nights ago and am trying to care for one with a similar neck injury. All but one that it attacked died and the hen that survived is injured with a pretty substantial laceration on her neck, one side of her neck feathers were ripped out. I covered the wound in blue wound powder. At first she seemed ok, then I noticed a day or two after she began standing apart from the rest of the flock and seemed reluctant to bend down to eat, she would sort of half-heartedly peck at the ground, and just acted generally dazed and sluggish. I figured her neck was sore or it hurt her to bend down. On day 3 I brought her inside into an isolation cage where it was warm (it had been quite rainy and cold on the day of the attack and morning after) as she seemed clearly to be in worse shape than I originally thought. Now it seems she's got a cold, slightly runny nose (clear), a little wheezy. I've been giving her VetRx topically (nostrils) and in water. She is NOT interested in grain, but will drink a mixture of raw milk and molasses readily. Tonight, Day 4 I noticed her one eye looks squinty. Is this indicative of infection? Wound is not oozing or open as far as I can tell and has scabbed over. If I administer antibiotics, does anyone know what's best to use in the situation? Would vitamins help? Not sure how to proceed.