Looking for help diagnosing bloody scab looking beak :(

[DulcisPulli]

Hi guys, recently noticed these bloody looking spots on the top center of the beak on two of our three chickens. I have no idea what this is.

Some information if it helps:
We are in Central Florida so its been very hot lately. Its only on two of the three buffs. Their run is sand/pdz and their coop is pine chips/pdz. I don't know what their pecking order is yet.

 

[Wyorp Rock]

Looks like it could be from pecking or possibly being cut on a feeder or fencing.