chickens802
Chirping
When I walked into the coop yesterday morning my beloved Silver Grey Dorking hen was dead. She was only 9 months old and showed absolutely no symptoms of being ill. I live in Northern Vermont and we have basically every chicken predator there is. I have 27 chickens and they have access to an electrified wooden fence with 1/2" hardwire mesh pen all day long. They also have an 8x10 coop and an 8x6 run placed in the center of the fenced-in area. The hardwire mesh is skirted out at the bottom to prevent any digging predators. The coop also has an electric door which I have programmed to close and open 45 minutes before and after sunrise and sunset. The only area that it is theoretically possible for a predator to breach is the fenced-in area because it is not covered. I do have 2 fake owls out and I have never had a problem with airborne predators. 
The main predators I have experienced are weasels, bears, and a skunk. I thoroughly check her body for any signs of blood or bite marks, there were none. I checked her vent for any signs of blockage or infection and it look perfectly healthy. Her comb was still bright red.
Ok so that was what happened yesterday...
Today when I entered the coop there was what looks like blood markings on the feeder. I will attach a picture below. In panic I counted all the hens multiple times and they are all accounted for. Where we live it does get very cold at times. In the beginning of Febuary we had a 1 and a half week stretch where is pretty much stayed below 0 degrees. Right now it is staying around 32 degrees in the daytime but is get into the low teens at night. Some of my hens do have white tips and a few with larger combs even have small black spots. My only guess as to what this came from is that there combs were bloody and it rubbed on the wood. Next I checked all of there combs for blood or scabs but there was no signs anything. There was only one hen, my Blue Andalusian that had a small scab on one of the tips of there comb. I just don't think that is what this from. I would really like to know what is going on so that I can take steps to help the health of the rest of my flock.
If anyone has seen anything like this or has any information they would be willing to share I would greatly appreciate it.

The main predators I have experienced are weasels, bears, and a skunk. I thoroughly check her body for any signs of blood or bite marks, there were none. I checked her vent for any signs of blockage or infection and it look perfectly healthy. Her comb was still bright red.
Ok so that was what happened yesterday...
Today when I entered the coop there was what looks like blood markings on the feeder. I will attach a picture below. In panic I counted all the hens multiple times and they are all accounted for. Where we live it does get very cold at times. In the beginning of Febuary we had a 1 and a half week stretch where is pretty much stayed below 0 degrees. Right now it is staying around 32 degrees in the daytime but is get into the low teens at night. Some of my hens do have white tips and a few with larger combs even have small black spots. My only guess as to what this came from is that there combs were bloody and it rubbed on the wood. Next I checked all of there combs for blood or scabs but there was no signs anything. There was only one hen, my Blue Andalusian that had a small scab on one of the tips of there comb. I just don't think that is what this from. I would really like to know what is going on so that I can take steps to help the health of the rest of my flock.

If anyone has seen anything like this or has any information they would be willing to share I would greatly appreciate it.