How long has he been like that? If he were mine, I'd maybe give him a couple of days to see if he improves. If he doesn't, I'd do the kindest thing for him and put him out of his misery. We need to put their comfort and needs ahead of ours, even if it makes us sad.
Roosters are not idiots; they're very smart. They are animals and they may not do everything that we expect them to do. They will put the flock/ hens first before you. Ignore the aggressive behaviour and they will be fine. Work with them, tell them "no" to correct bad behaviour, and maybe pick them up when relaxed so that you can handle them more. My roo is now about 6 months old; he's hormonal, but he's doing his job. His behavior will change over time.
Yes, and protection for the flock.
I would call it one component of flock protection. A rooster isn't going to be able to fight off a dog, coyote, fox, or any other larger predator. Often times, he's just a speed bump. A good rooster will sound an alarm if a threat is perceived. So will a dominant hen. That dominant hen will likely also lead the others to safety, as will a rooster. A rooster will be more likely to give his life to protect the flock, but then what? Then you're out a rooster and flock protector. So, I wouldn't rely entirely upon a rooster for protection. A good coop and run are also helpful. If you choose to free range, places of good cover are also helpful.
Well, a BSL is a cross between a RIR rooster and a Barred Rock hen, so I'd say he's probably a BSL Rooster
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I believe the BSL pullets are black and the roosters are white.
