Black spots and bleeding on comb - ideas?

[Chippylyons]

I noticed some black on the comb of my girl about a week or so ago, and thought it was dirt. Yesterday I noticed that a part of the comb is black and looks like it may fall off, and it is bleeding as well. I didn't notice the bleeding at first, but saw blood streaks on the feeder. When I went to take a picture (way easier said than done!) I could see the bleeding as well. I am wondering if this is due to the other chickens pecking her, a disease of some sort, or some sort of result of frost bite that could have occurred about 4 or so days ago...

 

[Eggcessive]

There does look to be a little frostbite on the comb--not all that bad, and maybe some peck marks. They can hit it on the feeders and waterers making it bleed. It will bleed pretty easily, and others may peck it making it bleed more and causing more damage. If you have Neosporin ointment, bag balm, or coconut oil, dab some on gently, and don't massage at all. Here is some info about frostbite treatment:
http://www.the-chicken-chick.com/2013/12/frostbit-in-backyard-chickens-causes.html
http://voices.yahoo.com/how-treat-chickens-suffering-frostbite-5294027.html?cat=53