Did you ever get these sores figured out? By your description, it sounds like there is some pecking going on. There are two main causes for pecking; low protein diet or overcrowding.
If it's possibly a protein issue, you can try feeding treats like canned catfood, tuna in water, scrambled eggs, or put them on a higher protein feed if they're on layer. Layer feed is usually around 16% protein and all-flock is generally 18%-20%.
If overcrowding is possible, it's recommended that each chicken has 4 sq feet of room in their coop, and 10-15 sq feet of room each in their run.
To post pictures, what device are you using as there are a couple of ways to post your pictures here. One is to use the Attach files button at the bottom of your reply.
