You don't have to answer these questions to me but answer them to yourself. Why do you even want one boy? What are your goals for having a rooster? The only reason you "need" a rooster is if you want fertile eggs. Everything else is a personal preference. Nothing wrong with personal preferences, I have a few myself, but those are wants not needs. You said you planned having one, not two, but why? That may help you decide which one to keep, if any.
What I'm trying to say is that I find it hard to predict how a mature rooster will behave toward mature hens based on how they behave when they are immature cockerels and immature pullets.
From what I'm reading I think the JO is the more dominant right now. That could change as they mature, SF's are supposed to be slower to mature. I don't know what that fight over a pullet looked like, I'd imagine the SF tried mating and the JO knocked him off. That torn comb may have been more of an accident in the fight or the JO may have been trying to kill the SF. That's how they do it, going for the head because that's where they can do the most damage. If you put them back together they may fight to the death or they may reach an accommodation on how to care for the flock together. The more room you have the better. That accommodation can look differently but a common way that works out is that each rooster claims his own territory so they can stay apart and the hens decide which boy they want to be with. But I've seen two boys hang out together and share the hens that way. You just never know what living animals will do.
So what are your options? First you need to decide whether you keep two, one or none. All these issues go away if you keep none. If you only keep one you can make that decision now and I agree, keep the SF. In the long term he may turn out OK or not, but that's the chance you take.
If you really want to keep both you can permanently house one separate from the other, either alone or split the girls between them. Totally separate housing, separate coops and runs. You can make a bachelor pad where the boys are with each other but no girls allowed. This doesn't always work but it's a pretty common way for people to keep multiple roosters without them hurting each other. It usually works. Or you can let them fight it out and see if they can reach an accommodation. Plenty of people on here keep a flock with multiple roosters and it works, but that often involves having a lot of room. Some people that try this have disasters.
It's your decision and should be based on your goals, not mine. It's not always an easy decision and can be kind of permanent. You don't get any guarantees on how it will work out. But all you can do is the bet you can based on what information you have and your circumstances. It's hard to do any better than you can. Good luck!
I don't know what that aggressive toward you looks like but that would be a huge flag for me. He may have made the decision for you.The JO is the more aggressive guy, towards us but not too bad, something I think we could correct in the long run; but it is there and
The problem with this is that they are both still immature cockerels, not mature roosters. The hormones are more in control now than they will be in the future. The more dominant of the two can suppress the behaviors of the less dominant. His behaviors toward you and toward the girls can totally change when that suppression is removed. And their behaviors, especially toward the girls, can change as they mature. Usually they become calmer as they get their hormones under control and as the girls mature.compared to our SF, it’s nonexistent. He’s not aggressive towards us at all, in fact he welcomes us.
What I'm trying to say is that I find it hard to predict how a mature rooster will behave toward mature hens based on how they behave when they are immature cockerels and immature pullets.
Again, I don't know what this looks like. It sounds like pretty normal behaviors between immature cockerels and immature pullets. I don't see any huge red flags here.Then, there’s the girls. The JO mates without permission and will generally upset them while the SF is much more gentle about it. Now, I’m not saying he’s perfect by any means, I have seen his hormones get the best of him a few times but at least the girls don’t squawk out so he must be gentle somehow, when it’s the JO the girls do cry out and fuss at him about it.
From what I'm reading I think the JO is the more dominant right now. That could change as they mature, SF's are supposed to be slower to mature. I don't know what that fight over a pullet looked like, I'd imagine the SF tried mating and the JO knocked him off. That torn comb may have been more of an accident in the fight or the JO may have been trying to kill the SF. That's how they do it, going for the head because that's where they can do the most damage. If you put them back together they may fight to the death or they may reach an accommodation on how to care for the flock together. The more room you have the better. That accommodation can look differently but a common way that works out is that each rooster claims his own territory so they can stay apart and the hens decide which boy they want to be with. But I've seen two boys hang out together and share the hens that way. You just never know what living animals will do.
So what are your options? First you need to decide whether you keep two, one or none. All these issues go away if you keep none. If you only keep one you can make that decision now and I agree, keep the SF. In the long term he may turn out OK or not, but that's the chance you take.
If you really want to keep both you can permanently house one separate from the other, either alone or split the girls between them. Totally separate housing, separate coops and runs. You can make a bachelor pad where the boys are with each other but no girls allowed. This doesn't always work but it's a pretty common way for people to keep multiple roosters without them hurting each other. It usually works. Or you can let them fight it out and see if they can reach an accommodation. Plenty of people on here keep a flock with multiple roosters and it works, but that often involves having a lot of room. Some people that try this have disasters.
It's your decision and should be based on your goals, not mine. It's not always an easy decision and can be kind of permanent. You don't get any guarantees on how it will work out. But all you can do is the bet you can based on what information you have and your circumstances. It's hard to do any better than you can. Good luck!