Chicken disease?

[chickensnstuff]

So I have a couple chickens who have these black splotches on their combs. They have had it for a while and I haven't thought much about it because they seemed fine and have had it for two years. What could it be?

 

[chickensnstuff]

 

[coach723]

Those are probably from being pecked, if it's been going on for two years.