Quick update to say I isolated the hen that was biting him for ~36 hours and now his comb has almost completely recovered, and there's no sign of blood anywhere now. :-) Thanks for all the input.
Well, I've isolated the hen that was pecking him for tonight. I'll see what to do in the morning. It seems like people think it could be a protein deficiency. Although they wander outside over a pretty big area eating whatever they want all day, so I assume they're getting a healthy diet of...
Plenty of space. The coop is big enough for 20, only has 10. Daytimes they're outside in a giant area. But, local wildlife can pass through that area, so maybe he had a fit with a cat or something. Although it seems weird his comb would be damaged. Otherwise he seems to be fine. Maybe he was...
We're in the process of adding birds to the flock. We have an old rooster and hen, plus two we added almost a year ago, and then we just added 6 more, who are just starting to lay.
I've noticed the rooster is bleeding, I think from his comb. When he shakes his head, there's blood drops flying...