Red sores all over my rooster’s feet, any idea what could be causing this?

My rooster recently developed red sores all over his feet. I first noticed them a little bit yesterday, but today they were much more noticeable.

I put my chickens in their run to keep them dry from the rain, and while doing so I noticed that his feathered feet were wet, which made the sores stand out a lot more. The sores appear to be spread across both feet rather than being just one spot.

Has anyone seen something like this before or know what might cause it? I’m trying to figure out whether it’s an injury, irritation from mud or moisture, mites, early bumblefoot, or something else.

Any advice or similar experiences would be appreciated. Thanks!