I was checking my hen's feet earlier and found an injury on one of her toes. I don't see any blood. It just looks like tissue came out and kind of dried up. I attached a couple pictures.
It looks like an injury to me, probably got the toe caught on something. Unless you see any signs of infection, it will likely heal up and be fine. Toes can get hung up on all sorts of things, fencing, feeders, ramps, gaps around roosts, etc.