the dropping looks very normalWhat do the droppings look like?
Have you brought any new birds into your loft recently?
Do rodents get into your loft?
What do you feed your pigeons?
Ok, i know.Do not let him walk around on it for now, just because he doesn't seem to show it doesn't mean he is not feeling any pain..
If it was my bird, I would soak the foot for a period of time, I would also give Arnica Montana for any blunt trauma and/or swelling.